1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 2 "http://www.w3.org/TR/html4/loose.dtd"> 3<html> 4<head> 5 <title>The XML C parser and toolkit of Gnome</title> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> 7</head> 8<body bgcolor="#ffffff"> 9<h1 align="center">The XML C parser and toolkit of Gnome</h1> 10 11<h1>Note: this is the flat content of the <a href="index.html">web 12site</a></h1> 13 14<h1 style="text-align: center">libxml, a.k.a. gnome-xml</h1> 15 16<p></p> 17 18<p 19style="text-align: right; font-style: italic; font-size: 10pt">"Programming 20with libxml2 is like the thrilling embrace of an exotic stranger." <a 21href="http://diveintomark.org/archives/2004/02/18/libxml2">Mark 22Pilgrim</a></p> 23 24<p>Libxml2 is the XML C parser and toolkit developed for the Gnome project 25(but usable outside of the Gnome platform), it is free software available 26under the <a href="http://www.opensource.org/licenses/mit-license.html">MIT 27License</a>. XML itself is a metalanguage to design markup languages, i.e. 28text language where semantic and structure are added to the content using 29extra "markup" information enclosed between angle brackets. HTML is the most 30well-known markup language. Though the library is written in C <a 31href="python.html">a variety of language bindings</a> make it available in 32other environments.</p> 33 34<p>Libxml2 is known to be very portable, the library should build and work 35without serious troubles on a variety of systems (Linux, Unix, Windows, 36CygWin, MacOS, MacOS X, RISC Os, OS/2, VMS, QNX, MVS, VxWorks, ...)</p> 37 38<p>Libxml2 implements a number of existing standards related to markup 39languages:</p> 40<ul> 41 <li>the XML standard: <a 42 href="http://www.w3.org/TR/REC-xml">http://www.w3.org/TR/REC-xml</a></li> 43 <li>Namespaces in XML: <a 44 href="http://www.w3.org/TR/REC-xml-names/">http://www.w3.org/TR/REC-xml-names/</a></li> 45 <li>XML Base: <a 46 href="http://www.w3.org/TR/xmlbase/">http://www.w3.org/TR/xmlbase/</a></li> 47 <li><a href="http://www.cis.ohio-state.edu/rfc/rfc2396.txt">RFC 2396</a> : 48 Uniform Resource Identifiers <a 49 href="http://www.ietf.org/rfc/rfc2396.txt">http://www.ietf.org/rfc/rfc2396.txt</a></li> 50 <li>XML Path Language (XPath) 1.0: <a 51 href="http://www.w3.org/TR/xpath">http://www.w3.org/TR/xpath</a></li> 52 <li>HTML4 parser: <a 53 href="http://www.w3.org/TR/html401/">http://www.w3.org/TR/html401/</a></li> 54 <li>XML Pointer Language (XPointer) Version 1.0: <a 55 href="http://www.w3.org/TR/xptr">http://www.w3.org/TR/xptr</a></li> 56 <li>XML Inclusions (XInclude) Version 1.0: <a 57 href="http://www.w3.org/TR/xinclude/">http://www.w3.org/TR/xinclude/</a></li> 58 <li>ISO-8859-x encodings, as well as <a 59 href="http://www.cis.ohio-state.edu/rfc/rfc2044.txt">rfc2044</a> [UTF-8] 60 and <a href="http://www.cis.ohio-state.edu/rfc/rfc2781.txt">rfc2781</a> 61 [UTF-16] Unicode encodings, and more if using iconv support</li> 62 <li>part of SGML Open Technical Resolution TR9401:1997</li> 63 <li>XML Catalogs Working Draft 06 August 2001: <a 64 href="http://www.oasis-open.org/committees/entity/spec-2001-08-06.html">http://www.oasis-open.org/committees/entity/spec-2001-08-06.html</a></li> 65 <li>Canonical XML Version 1.0: <a 66 href="http://www.w3.org/TR/xml-c14n">http://www.w3.org/TR/xml-c14n</a> 67 and the Exclusive XML Canonicalization CR draft <a 68 href="http://www.w3.org/TR/xml-exc-c14n">http://www.w3.org/TR/xml-exc-c14n</a></li> 69 <li>Relax NG, ISO/IEC 19757-2:2003, <a 70 href="http://www.oasis-open.org/committees/relax-ng/spec-20011203.html">http://www.oasis-open.org/committees/relax-ng/spec-20011203.html</a></li> 71 <li>W3C XML Schemas Part 2: Datatypes <a 72 href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/">REC 02 May 73 2001</a></li> 74 <li>W3C <a href="http://www.w3.org/TR/xml-id/">xml:id</a> Working Draft 7 75 April 2004</li> 76</ul> 77 78<p>In most cases libxml2 tries to implement the specifications in a 79relatively strictly compliant way. As of release 2.4.16, libxml2 passed all 801800+ tests from the <a 81href="http://www.oasis-open.org/committees/xml-conformance/">OASIS XML Tests 82Suite</a>.</p> 83 84<p>To some extent libxml2 provides support for the following additional 85specifications but doesn't claim to implement them completely:</p> 86<ul> 87 <li>Document Object Model (DOM) <a 88 href="http://www.w3.org/TR/DOM-Level-2-Core/">http://www.w3.org/TR/DOM-Level-2-Core/</a> 89 the document model, but it doesn't implement the API itself, gdome2 does 90 this on top of libxml2</li> 91 <li><a href="http://www.cis.ohio-state.edu/rfc/rfc959.txt">RFC 959</a> : 92 libxml2 implements a basic FTP client code</li> 93 <li><a href="http://www.cis.ohio-state.edu/rfc/rfc1945.txt">RFC 1945</a> : 94 HTTP/1.0, again a basic HTTP client code</li> 95 <li>SAX: a SAX2 like interface and a minimal SAX1 implementation compatible 96 with early expat versions</li> 97</ul> 98 99<p>A partial implementation of <a 100href="http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/">XML Schemas Part 1011: Structure</a> is being worked on but it would be far too early to make any 102conformance statement about it at the moment.</p> 103 104<p>Separate documents:</p> 105<ul> 106 <li><a href="http://xmlsoft.org/XSLT/">the libxslt page</a> providing an 107 implementation of XSLT 1.0 and common extensions like EXSLT for 108 libxml2</li> 109 <li><a href="http://gdome2.cs.unibo.it/">the gdome2 page</a> 110 : a standard DOM2 implementation for libxml2</li> 111 <li><a href="http://www.aleksey.com/xmlsec/">the XMLSec page</a>: an 112 implementation of <a href="http://www.w3.org/TR/xmldsig-core/">W3C XML 113 Digital Signature</a> for libxml2</li> 114 <li>also check the related links section for more related and active 115 projects.</li> 116</ul> 117<p> Hosting sponsored by <a href="http://www.aoemedia.de/opensource-cms.html" 118>Open Source CMS services</a> from AOE media.</p> 119 120<p>Logo designed by <a href="mailto:liyanage@access.ch">Marc Liyanage</a>.</p> 121 122<h2><a name="Introducti">Introduction</a></h2> 123 124<p>This document describes libxml, the <a 125href="http://www.w3.org/XML/">XML</a> C parser and toolkit developed for the 126<a href="http://www.gnome.org/">Gnome</a> project. <a 127href="http://www.w3.org/XML/">XML is a standard</a> for building tag-based 128structured documents/data.</p> 129 130<p>Here are some key points about libxml:</p> 131<ul> 132 <li>Libxml2 exports Push (progressive) and Pull (blocking) type parser 133 interfaces for both XML and HTML.</li> 134 <li>Libxml2 can do DTD validation at parse time, using a parsed document 135 instance, or with an arbitrary DTD.</li> 136 <li>Libxml2 includes complete <a 137 href="http://www.w3.org/TR/xpath">XPath</a>, <a 138 href="http://www.w3.org/TR/xptr">XPointer</a> and <a 139 href="http://www.w3.org/TR/xinclude">XInclude</a> implementations.</li> 140 <li>It is written in plain C, making as few assumptions as possible, and 141 sticking closely to ANSI C/POSIX for easy embedding. Works on 142 Linux/Unix/Windows, ported to a number of other platforms.</li> 143 <li>Basic support for HTTP and FTP client allowing applications to fetch 144 remote resources.</li> 145 <li>The design is modular, most of the extensions can be compiled out.</li> 146 <li>The internal document representation is as close as possible to the <a 147 href="http://www.w3.org/DOM/">DOM</a> interfaces.</li> 148 <li>Libxml2 also has a <a 149 href="http://www.megginson.com/SAX/index.html">SAX like interface</a>; 150 the interface is designed to be compatible with <a 151 href="http://www.jclark.com/xml/expat.html">Expat</a>.</li> 152 <li>This library is released under the <a 153 href="http://www.opensource.org/licenses/mit-license.html">MIT 154 License</a>. See the Copyright file in the distribution for the precise 155 wording.</li> 156</ul> 157 158<p>Warning: unless you are forced to because your application links with a 159Gnome-1.X library requiring it, <strong><span 160style="background-color: #FF0000">Do Not Use libxml1</span></strong>, use 161libxml2</p> 162 163<h2><a name="FAQ">FAQ</a></h2> 164 165<p>Table of Contents:</p> 166<ul> 167 <li><a href="FAQ.html#License">License(s)</a></li> 168 <li><a href="FAQ.html#Installati">Installation</a></li> 169 <li><a href="FAQ.html#Compilatio">Compilation</a></li> 170 <li><a href="FAQ.html#Developer">Developer corner</a></li> 171</ul> 172 173<h3><a name="License">License</a>(s)</h3> 174<ol> 175 <li><em>Licensing Terms for libxml</em> 176 <p>libxml2 is released under the <a 177 href="http://www.opensource.org/licenses/mit-license.html">MIT 178 License</a>; see the file Copyright in the distribution for the precise 179 wording</p> 180 </li> 181 <li><em>Can I embed libxml2 in a proprietary application ?</em> 182 <p>Yes. The MIT License allows you to keep proprietary the changes you 183 made to libxml, but it would be graceful to send-back bug fixes and 184 improvements as patches for possible incorporation in the main 185 development tree.</p> 186 </li> 187</ol> 188 189<h3><a name="Installati">Installation</a></h3> 190<ol> 191 <li><strong><span style="background-color: #FF0000">Do Not Use 192 libxml1</span></strong>, use libxml2</li> 193 <p></p> 194 <li><em>Where can I get libxml</em> ? 195 <p>The original distribution comes from <a 196 href="ftp://xmlsoft.org/libxml2/">xmlsoft.org</a> or <a 197 href="ftp://ftp.gnome.org/pub/GNOME/sources/libxml2/2.6/">gnome.org</a></p> 198 <p>Most Linux and BSD distributions include libxml, this is probably the 199 safer way for end-users to use libxml.</p> 200 <p>David Doolin provides precompiled Windows versions at <a 201 href="http://www.ce.berkeley.edu/~doolin/code/libxmlwin32/ ">http://www.ce.berkeley.edu/~doolin/code/libxmlwin32/</a></p> 202 </li> 203 <p></p> 204 <li><em>I see libxml and libxml2 releases, which one should I install ?</em> 205 <ul> 206 <li>If you are not constrained by backward compatibility issues with 207 existing applications, install libxml2 only</li> 208 <li>If you are not doing development, you can safely install both. 209 Usually the packages <a 210 href="http://rpmfind.net/linux/RPM/libxml.html">libxml</a> and <a 211 href="http://rpmfind.net/linux/RPM/libxml2.html">libxml2</a> are 212 compatible (this is not the case for development packages).</li> 213 <li>If you are a developer and your system provides separate packaging 214 for shared libraries and the development components, it is possible 215 to install libxml and libxml2, and also <a 216 href="http://rpmfind.net/linux/RPM/libxml-devel.html">libxml-devel</a> 217 and <a 218 href="http://rpmfind.net/linux/RPM/libxml2-devel.html">libxml2-devel</a> 219 too for libxml2 >= 2.3.0</li> 220 <li>If you are developing a new application, please develop against 221 libxml2(-devel)</li> 222 </ul> 223 </li> 224 <li><em>I can't install the libxml package, it conflicts with libxml0</em> 225 <p>You probably have an old libxml0 package used to provide the shared 226 library for libxml.so.0, you can probably safely remove it. The libxml 227 packages provided on <a 228 href="ftp://xmlsoft.org/libxml2/">xmlsoft.org</a> provide 229 libxml.so.0</p> 230 </li> 231 <li><em>I can't install the libxml(2) RPM package due to failed 232 dependencies</em> 233 <p>The most generic solution is to re-fetch the latest src.rpm , and 234 rebuild it locally with</p> 235 <p><code>rpm --rebuild libxml(2)-xxx.src.rpm</code>.</p> 236 <p>If everything goes well it will generate two binary rpm packages (one 237 providing the shared libs and xmllint, and the other one, the -devel 238 package, providing includes, static libraries and scripts needed to build 239 applications with libxml(2)) that you can install locally.</p> 240 </li> 241</ol> 242 243<h3><a name="Compilatio">Compilation</a></h3> 244<ol> 245 <li><em>What is the process to compile libxml2 ?</em> 246 <p>As most UNIX libraries libxml2 follows the "standard":</p> 247 <p><code>gunzip -c xxx.tar.gz | tar xvf -</code></p> 248 <p><code>cd libxml-xxxx</code></p> 249 <p><code>./configure --help</code></p> 250 <p>to see the options, then the compilation/installation proper</p> 251 <p><code>./configure [possible options]</code></p> 252 <p><code>make</code></p> 253 <p><code>make install</code></p> 254 <p>At that point you may have to rerun ldconfig or a similar utility to 255 update your list of installed shared libs.</p> 256 </li> 257 <li><em>What other libraries are needed to compile/install libxml2 ?</em> 258 <p>Libxml2 does not require any other library, the normal C ANSI API 259 should be sufficient (please report any violation to this rule you may 260 find).</p> 261 <p>However if found at configuration time libxml2 will detect and use the 262 following libs:</p> 263 <ul> 264 <li><a href="http://www.info-zip.org/pub/infozip/zlib/">libz</a> : a 265 highly portable and available widely compression library.</li> 266 <li>iconv: a powerful character encoding conversion library. It is 267 included by default in recent glibc libraries, so it doesn't need to 268 be installed specifically on Linux. It now seems a <a 269 href="http://www.opennc.org/onlinepubs/7908799/xsh/iconv.html">part 270 of the official UNIX</a> specification. Here is one <a 271 href="http://www.gnu.org/software/libiconv/">implementation of the 272 library</a> which source can be found <a 273 href="ftp://ftp.ilog.fr/pub/Users/haible/gnu/">here</a>.</li> 274 </ul> 275 </li> 276 <p></p> 277 <li><em>Make check fails on some platforms</em> 278 <p>Sometimes the regression tests' results don't completely match the 279 value produced by the parser, and the makefile uses diff to print the 280 delta. On some platforms the diff return breaks the compilation process; 281 if the diff is small this is probably not a serious problem.</p> 282 <p>Sometimes (especially on Solaris) make checks fail due to limitations 283 in make. Try using GNU-make instead.</p> 284 </li> 285 <li><em>I use the SVN version and there is no configure script</em> 286 <p>The configure script (and other Makefiles) are generated. Use the 287 autogen.sh script to regenerate the configure script and Makefiles, 288 like:</p> 289 <p><code>./autogen.sh --prefix=/usr --disable-shared</code></p> 290 </li> 291 <li><em>I have troubles when running make tests with gcc-3.0</em> 292 <p>It seems the initial release of gcc-3.0 has a problem with the 293 optimizer which miscompiles the URI module. Please use another 294 compiler.</p> 295 </li> 296</ol> 297 298<h3><a name="Developer">Developer</a> corner</h3> 299<ol> 300 <li><em>Troubles compiling or linking programs using libxml2</em> 301 <p>Usually the problem comes from the fact that the compiler doesn't get 302 the right compilation or linking flags. There is a small shell script 303 <code>xml2-config</code> which is installed as part of libxml2 usual 304 install process which provides those flags. Use</p> 305 <p><code>xml2-config --cflags</code></p> 306 <p>to get the compilation flags and</p> 307 <p><code>xml2-config --libs</code></p> 308 <p>to get the linker flags. Usually this is done directly from the 309 Makefile as:</p> 310 <p><code>CFLAGS=`xml2-config --cflags`</code></p> 311 <p><code>LIBS=`xml2-config --libs`</code></p> 312 </li> 313 <li><em>I want to install my own copy of libxml2 in my home directory and 314 link my programs against it, but it doesn't work</em> 315 <p>There are many different ways to accomplish this. Here is one way to 316 do this under Linux. Suppose your home directory is <code>/home/user. 317 </code>Then:</p> 318 <ul> 319 <li>Create a subdirectory, let's call it <code>myxml</code></li> 320 <li>unpack the libxml2 distribution into that subdirectory</li> 321 <li>chdir into the unpacked distribution 322 (<code>/home/user/myxml/libxml2 </code>)</li> 323 <li>configure the library using the "<code>--prefix</code>" switch, 324 specifying an installation subdirectory in 325 <code>/home/user/myxml</code>, e.g. 326 <p><code>./configure --prefix /home/user/myxml/xmlinst</code> {other 327 configuration options}</p> 328 </li> 329 <li>now run <code>make</code> followed by <code>make install</code></li> 330 <li>At this point, the installation subdirectory contains the complete 331 "private" include files, library files and binary program files (e.g. 332 xmllint), located in 333 <p><code>/home/user/myxml/xmlinst/lib, 334 /home/user/myxml/xmlinst/include </code> and <code> 335 /home/user/myxml/xmlinst/bin</code></p> 336 respectively.</li> 337 <li>In order to use this "private" library, you should first add it to 338 the beginning of your default PATH (so that your own private program 339 files such as xmllint will be used instead of the normal system 340 ones). To do this, the Bash command would be 341 <p><code>export PATH=/home/user/myxml/xmlinst/bin:$PATH</code></p> 342 </li> 343 <li>Now suppose you have a program <code>test1.c</code> that you would 344 like to compile with your "private" library. Simply compile it using 345 the command 346 <p><code>gcc `xml2-config --cflags --libs` -o test test.c</code></p> 347 Note that, because your PATH has been set with <code> 348 /home/user/myxml/xmlinst/bin</code> at the beginning, the xml2-config 349 program which you just installed will be used instead of the system 350 default one, and this will <em>automatically</em> get the correct 351 libraries linked with your program.</li> 352 </ul> 353 </li> 354 355 <p></p> 356 <li><em>xmlDocDump() generates output on one line.</em> 357 <p>Libxml2 will not <strong>invent</strong> spaces in the content of a 358 document since <strong>all spaces in the content of a document are 359 significant</strong>. If you build a tree from the API and want 360 indentation:</p> 361 <ol> 362 <li>the correct way is to generate those yourself too.</li> 363 <li>the dangerous way is to ask libxml2 to add those blanks to your 364 content <strong>modifying the content of your document in the 365 process</strong>. The result may not be what you expect. There is 366 <strong>NO</strong> way to guarantee that such a modification won't 367 affect other parts of the content of your document. See <a 368 href="http://xmlsoft.org/html/libxml-parser.html#xmlKeepBlanksDefault">xmlKeepBlanksDefault 369 ()</a> and <a 370 href="http://xmlsoft.org/html/libxml-tree.html#xmlSaveFormatFile">xmlSaveFormatFile 371 ()</a></li> 372 </ol> 373 </li> 374 <p></p> 375 <li><em>Extra nodes in the document:</em> 376 <p><em>For an XML file as below:</em></p> 377 <pre><?xml version="1.0"?> 378<PLAN xmlns="http://www.argus.ca/autotest/1.0/"> 379<NODE CommFlag="0"/> 380<NODE CommFlag="1"/> 381</PLAN></pre> 382 <p><em>after parsing it with the function 383 pxmlDoc=xmlParseFile(...);</em></p> 384 <p><em>I want to the get the content of the first node (node with the 385 CommFlag="0")</em></p> 386 <p><em>so I did it as following;</em></p> 387 <pre>xmlNodePtr pnode; 388pnode=pxmlDoc->children->children;</pre> 389 <p><em>but it does not work. If I change it to</em></p> 390 <pre>pnode=pxmlDoc->children->children->next;</pre> 391 <p><em>then it works. Can someone explain it to me.</em></p> 392 <p></p> 393 <p>In XML all characters in the content of the document are significant 394 <strong>including blanks and formatting line breaks</strong>.</p> 395 <p>The extra nodes you are wondering about are just that, text nodes with 396 the formatting spaces which are part of the document but that people tend 397 to forget. There is a function <a 398 href="http://xmlsoft.org/html/libxml-parser.html">xmlKeepBlanksDefault 399 ()</a> to remove those at parse time, but that's an heuristic, and its 400 use should be limited to cases where you are certain there is no 401 mixed-content in the document.</p> 402 </li> 403 <li><em>I get compilation errors of existing code like when accessing 404 <strong>root</strong> or <strong>child fields</strong> of nodes.</em> 405 <p>You are compiling code developed for libxml version 1 and using a 406 libxml2 development environment. Either switch back to libxml v1 devel or 407 even better fix the code to compile with libxml2 (or both) by <a 408 href="upgrade.html">following the instructions</a>.</p> 409 </li> 410 <li><em>I get compilation errors about non existing 411 <strong>xmlRootNode</strong> or <strong>xmlChildrenNode</strong> 412 fields.</em> 413 <p>The source code you are using has been <a 414 href="upgrade.html">upgraded</a> to be able to compile with both libxml 415 and libxml2, but you need to install a more recent version: 416 libxml(-devel) >= 1.8.8 or libxml2(-devel) >= 2.1.0</p> 417 </li> 418 <li><em>Random crashes in threaded applications</em> 419 <p>Read and follow all advices on the <a href="threads.html">thread 420 safety</a> page, and make 100% sure you never call xmlCleanupParser() 421 while the library or an XML document might still be in use by another 422 thread.</p> 423 </li> 424 <li><em>The example provided in the web page does not compile.</em> 425 <p>It's hard to maintain the documentation in sync with the code 426 <grin/> ...</p> 427 <p>Check the previous points 1/ and 2/ raised before, and please send 428 patches.</p> 429 </li> 430 <li><em>Where can I get more examples and information than provided on the 431 web page?</em> 432 <p>Ideally a libxml2 book would be nice. I have no such plan ... But you 433 can:</p> 434 <ul> 435 <li>check more deeply the <a href="html/libxml-lib.html">existing 436 generated doc</a></li> 437 <li>have a look at <a href="examples/index.html">the set of 438 examples</a>.</li> 439 <li>look for examples of use for libxml2 function using the Gnome code 440 or by asking on Google.</li> 441 <li><a 442 href="http://svn.gnome.org/viewvc/libxml2/trunk/">Browse 443 the libxml2 source</a> , I try to write code as clean and documented 444 as possible, so looking at it may be helpful. In particular the code 445 of <a href="http://svn.gnome.org/viewvc/libxml2/trunk/xmllint.c?view=markup">xmllint.c</a> and of the various testXXX.c test programs should 446 provide good examples of how to do things with the library.</li> 447 </ul> 448 </li> 449 <p></p> 450 <li><em>What about C++ ?</em> 451 <p>libxml2 is written in pure C in order to allow easy reuse on a number 452 of platforms, including embedded systems. I don't intend to convert to 453 C++.</p> 454 <p>There is however a C++ wrapper which may fulfill your needs:</p> 455 <ul> 456 <li>by Ari Johnson <ari@btigate.com>: 457 <p>Website: <a 458 href="http://libxmlplusplus.sourceforge.net/">http://libxmlplusplus.sourceforge.net/</a></p> 459 <p>Download: <a 460 href="http://sourceforge.net/project/showfiles.php?group_id=12999">http://sourceforge.net/project/showfiles.php?group_id=12999</a></p> 461 </li> 462 </ul> 463 </li> 464 <li><em>How to validate a document a posteriori ?</em> 465 <p>It is possible to validate documents which had not been validated at 466 initial parsing time or documents which have been built from scratch 467 using the API. Use the <a 468 href="http://xmlsoft.org/html/libxml-valid.html#xmlValidateDtd">xmlValidateDtd()</a> 469 function. It is also possible to simply add a DTD to an existing 470 document:</p> 471 <pre>xmlDocPtr doc; /* your existing document */ 472xmlDtdPtr dtd = xmlParseDTD(NULL, filename_of_dtd); /* parse the DTD */ 473 474 dtd->name = xmlStrDup((xmlChar*)"root_name"); /* use the given root */ 475 476 doc->intSubset = dtd; 477 if (doc->children == NULL) xmlAddChild((xmlNodePtr)doc, (xmlNodePtr)dtd); 478 else xmlAddPrevSibling(doc->children, (xmlNodePtr)dtd); 479 </pre> 480 </li> 481 <li><em>So what is this funky "xmlChar" used all the time?</em> 482 <p>It is a null terminated sequence of utf-8 characters. And only utf-8! 483 You need to convert strings encoded in different ways to utf-8 before 484 passing them to the API. This can be accomplished with the iconv library 485 for instance.</p> 486 </li> 487 <li>etc ...</li> 488</ol> 489 490<p></p> 491 492<h2><a name="Documentat">Developer Menu</a></h2> 493 494<p>There are several on-line resources related to using libxml:</p> 495<ol> 496 <li>Use the <a href="search.php">search engine</a> to look up 497 information.</li> 498 <li>Check the <a href="FAQ.html">FAQ.</a></li> 499 <li>Check the <a href="http://xmlsoft.org/html/libxml-lib.html">extensive 500 documentation</a> automatically extracted from code comments.</li> 501 <li>Look at the documentation about <a href="encoding.html">libxml 502 internationalization support</a>.</li> 503 <li>This page provides a global overview and <a href="example.html">some 504 examples</a> on how to use libxml.</li> 505 <li><a href="examples/index.html">Code examples</a></li> 506 <li>John Fleck's libxml2 tutorial: <a href="tutorial/index.html">html</a> 507 or <a href="tutorial/xmltutorial.pdf">pdf</a>.</li> 508 <li>If you need to parse large files, check the <a 509 href="xmlreader.html">xmlReader</a> API tutorial</li> 510 <li><a href="mailto:james@daa.com.au">James Henstridge</a> wrote <a 511 href="http://www.jamesh.id.au/articles/libxml-sax/libxml-sax.html">some nice 512 documentation</a> explaining how to use the libxml SAX interface.</li> 513 <li>George Lebl wrote <a 514 href="http://www-106.ibm.com/developerworks/library/l-gnome3/">an article 515 for IBM developerWorks</a> about using libxml.</li> 516 <li>Check <a href="http://svn.gnome.org/viewvc/libxml2/trunk/TODO?view=markup">the TODO 517 file</a>.</li> 518 <li>Read the <a href="upgrade.html">1.x to 2.x upgrade path</a> 519 description. If you are starting a new project using libxml you should 520 really use the 2.x version.</li> 521 <li>And don't forget to look at the <a 522 href="http://mail.gnome.org/archives/xml/">mailing-list archive</a>.</li> 523</ol> 524 525<h2><a name="Reporting">Reporting bugs and getting help</a></h2> 526 527<p>Well, bugs or missing features are always possible, and I will make a 528point of fixing them in a timely fashion. The best way to report a bug is to 529use the <a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">Gnome 530bug tracking database</a> (make sure to use the "libxml2" module name). I 531look at reports there regularly and it's good to have a reminder when a bug 532is still open. Be sure to specify that the bug is for the package libxml2.</p> 533 534<p>For small problems you can try to get help on IRC, the #xml channel on 535irc.gnome.org (port 6667) usually have a few person subscribed which may help 536(but there is no guarantee and if a real issue is raised it should go on the 537mailing-list for archival).</p> 538 539<p>There is also a mailing-list <a 540href="mailto:xml@gnome.org">xml@gnome.org</a> for libxml, with an <a 541href="http://mail.gnome.org/archives/xml/">on-line archive</a> (<a 542href="http://xmlsoft.org/messages">old</a>). To subscribe to this list, 543please visit the <a 544href="http://mail.gnome.org/mailman/listinfo/xml">associated Web</a> page and 545follow the instructions. <strong>Do not send code, I won't debug it</strong> 546(but patches are really appreciated!).</p> 547 548<p>Please note that with the current amount of virus and SPAM, sending mail 549to the list without being subscribed won't work. There is *far too many 550bounces* (in the order of a thousand a day !) I cannot approve them manually 551anymore. If your mail to the list bounced waiting for administrator approval, 552it is LOST ! Repost it and fix the problem triggering the error. Also please 553note that <span style="color: #FF0000; background-color: #FFFFFF">emails with 554a legal warning asking to not copy or redistribute freely the information 555they contain</span> are <strong>NOT</strong> acceptable for the mailing-list, 556such mail will as much as possible be discarded automatically, and are less 557likely to be answered if they made it to the list, <strong>DO NOT</strong> 558post to the list from an email address where such legal requirements are 559automatically added, get private paying support if you can't share 560information.</p> 561 562<p>Check the following <strong><span style="color: #FF0000">before 563posting</span></strong>:</p> 564<ul> 565 <li>Read the <a href="FAQ.html">FAQ</a> and <a href="search.php">use the 566 search engine</a> to get information related to your problem.</li> 567 <li>Make sure you are <a href="ftp://xmlsoft.org/libxml2/">using a recent 568 version</a>, and that the problem still shows up in a recent version.</li> 569 <li>Check the <a href="http://mail.gnome.org/archives/xml/">list 570 archives</a> to see if the problem was reported already. In this case 571 there is probably a fix available, similarly check the <a 572 href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">registered 573 open bugs</a>.</li> 574 <li>Make sure you can reproduce the bug with xmllint or one of the test 575 programs found in source in the distribution.</li> 576 <li>Please send the command showing the error as well as the input (as an 577 attachment)</li> 578</ul> 579 580<p>Then send the bug with associated information to reproduce it to the <a 581href="mailto:xml@gnome.org">xml@gnome.org</a> list; if it's really libxml 582related I will approve it. Please do not send mail to me directly, it makes 583things really hard to track and in some cases I am not the best person to 584answer a given question, ask on the list.</p> 585 586<p>To <span style="color: #E50000">be really clear about support</span>:</p> 587<ul> 588 <li>Support or help <span style="color: #E50000">requests MUST be sent to 589 the list or on bugzilla</span> in case of problems, so that the Question 590 and Answers can be shared publicly. Failing to do so carries the implicit 591 message "I want free support but I don't want to share the benefits with 592 others" and is not welcome. I will automatically Carbon-Copy the 593 xml@gnome.org mailing list for any technical reply made about libxml2 or 594 libxslt.</li> 595 <li>There is <span style="color: #E50000">no guarantee of support</span>. If 596 your question remains unanswered after a week, repost it, making sure you 597 gave all the detail needed and the information requested.</li> 598 <li>Failing to provide information as requested or double checking first 599 for prior feedback also carries the implicit message "the time of the 600 library maintainers is less valuable than my time" and might not be 601 welcome.</li> 602</ul> 603 604<p>Of course, bugs reported with a suggested patch for fixing them will 605probably be processed faster than those without.</p> 606 607<p>If you're looking for help, a quick look at <a 608href="http://mail.gnome.org/archives/xml/">the list archive</a> may actually 609provide the answer. I usually send source samples when answering libxml2 610usage questions. The <a 611href="http://xmlsoft.org/html/book1.html">auto-generated documentation</a> is 612not as polished as I would like (i need to learn more about DocBook), but 613it's a good starting point.</p> 614 615<h2><a name="help">How to help</a></h2> 616 617<p>You can help the project in various ways, the best thing to do first is to 618subscribe to the mailing-list as explained before, check the <a 619href="http://mail.gnome.org/archives/xml/">archives </a>and the <a 620href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">Gnome bug 621database</a>:</p> 622<ol> 623 <li>Provide patches when you find problems.</li> 624 <li>Provide the diffs when you port libxml2 to a new platform. They may not 625 be integrated in all cases but help pinpointing portability problems 626 and</li> 627 <li>Provide documentation fixes (either as patches to the code comments or 628 as HTML diffs).</li> 629 <li>Provide new documentations pieces (translations, examples, etc 630 ...).</li> 631 <li>Check the TODO file and try to close one of the items.</li> 632 <li>Take one of the points raised in the archive or the bug database and 633 provide a fix. <a href="mailto:daniel@veillard.com">Get in touch with me 634 </a>before to avoid synchronization problems and check that the suggested 635 fix will fit in nicely :-)</li> 636</ol> 637 638<h2><a name="Downloads">Downloads</a></h2> 639 640<p>The latest versions of libxml2 can be found on the <a 641href="ftp://xmlsoft.org/libxml2/">xmlsoft.org</a> server ( <a 642href="ftp://xmlsoft.org/libxml2/">FTP</a> and rsync are available), there are also 643mirrors (<a href="ftp://fr.rpmfind.net/pub/libxml/">France</a> and 644Antonin Sprinzl also provide <a href="ftp://gd.tuwien.ac.at/pub/libxml/">a 645mirror in Austria</a>). (NOTE that you need both the <a 646href="http://rpmfind.net/linux/RPM/libxml2.html">libxml(2)</a> and <a 647href="http://rpmfind.net/linux/RPM/libxml2-devel.html">libxml(2)-devel</a> 648packages installed to compile applications using libxml if using RPMs.)</p> 649 650<p>You can find all the history of libxml(2) and libxslt releases in the <a 651href="http://xmlsoft.org/sources/old/">old</a> directory. The precompiled 652Windows binaries made by Igor Zlatovic are available in the <a 653href="http://xmlsoft.org/sources/win32/">win32</a> directory.</p> 654 655<p>Binary ports:</p> 656<ul> 657 <li>RPMs for x86_64 are available directly on <a 658 href="ftp://xmlsoft.org/libxml2/">xmlsoft.org</a>, the source RPM will compile on 659 any architecture supported.</li> 660 <li><a href="mailto:igor@zlatkovic.com">Igor Zlatkovic</a> is now the 661 maintainer of the Windows port, <a 662 href="http://www.zlatkovic.com/projects/libxml/index.html">he provides 663 binaries</a>.</li> 664 <li>OpenCSW provides <a 665 href="http://opencsw.org/packages/libxml2">Solaris 666 binaries</a>.</li> 667 <li><a href="mailto:Steve.Ball@explain.com.au">Steve Ball</a> provides <a 668 href="http://www.explain.com.au/oss/libxml2xslt.html">Mac Os X 669 binaries</a>.</li> 670 <li>The HP-UX porting center provides <a 671 href="http://hpux.connect.org.uk/hppd/hpux/Gnome/">HP-UX binaries</a></li> 672 <li>Bull provides precompiled <a 673 href="http://gnome.bullfreeware.com/new_index.html">RPMs for AIX</a> as 674 patr of their GNOME packages</li> 675</ul> 676 677<p>If you know other supported binary ports, please <a 678href="http://veillard.com/">contact me</a>.</p> 679 680<p><a name="Snapshot">Snapshot:</a></p> 681<ul> 682 <li>Code from the GNOME GIT base libxml2 module, updated hourly <a 683 href="ftp://xmlsoft.org/libxml2/libxml2-git-snapshot.tar.gz">libxml2-git-snapshot.tar.gz</a>.</li> 684 <li>Docs, content of the web site, the list archive included <a 685 href="ftp://xmlsoft.org/libxml2/libxml-docs.tar.gz">libxml-docs.tar.gz</a>.</li> 686</ul> 687 688<p><a name="Contribs">Contributions:</a></p> 689 690<p>I do accept external contributions, especially if compiling on another 691platform, get in touch with the list to upload the package, wrappers for 692various languages have been provided, and can be found in the <a 693href="python.html">bindings section</a></p> 694 695<p>Libxml2 is also available from GIT:</p> 696<ul> 697 <li><p>See <a href="http://git.gnome.org/browse/libxml2/">libxml2 Git web</a>. 698 To checkout a local tree use:</p> 699 <pre>git clone git://git.gnome.org/libxml2</pre> 700 </li> 701 <li>The <strong>libxslt</strong> module is also present 702 <a href="http://git.gnome.org/browse/libxslt/">there</a>.</li> 703</ul> 704 705<h2><a name="News">Releases</a></h2> 706 707<p>The <a href="ChangeLog.html">change log</a> describes the recents commits 708to the <a href="http://git.gnome.org/browse/libxml2/">GIT</a> code base.</p> 709 710<p>Here is the list of public releases:</p> 711 712<h3>2.9.2: Oct 16 2014</h3> 713<ul> 714 <li>Security:<br/> 715 Fix for CVE-2014-3660 billion laugh variant (Daniel Veillard),<br/> 716 CVE-2014-0191 Do not fetch external parameter entities (Daniel Veillard)<br/> 717 </li> 718 719 <li>Bug Fixes:<br/> 720 fix memory leak xml header encoding field with XML_PARSE_IGNORE_ENC (Bart De Schuymer),<br/> 721 xmlmemory: handle realloc properly (Yegor Yefremov),<br/> 722 Python generator bug raised by the const change (Daniel Veillard),<br/> 723 Windows Critical sections not released correctly (Daniel Veillard),<br/> 724 Parser error on repeated recursive entity expansion containing &lt; (Daniel Veillard),<br/> 725 xpointer : fixing Null Pointers (Gaurav Gupta),<br/> 726 Remove Unnecessary Null check in xpointer.c (Gaurav Gupta),<br/> 727 parser bug on misformed namespace attributes (Dennis Filder),<br/> 728 Pointer dereferenced before null check (Daniel Veillard),<br/> 729 Leak of struct addrinfo in xmlNanoFTPConnect() (Gaurav Gupta),<br/> 730 Possible overflow in HTMLParser.c (Daniel Veillard),<br/> 731 python/tests/sync.py assumes Python dictionaries are ordered (John Beck),<br/> 732 Fix Enum check and missing break (Gaurav Gupta),<br/> 733 xmlIO: Handle error returns from dup() (Philip Withnall),<br/> 734 Fix a problem properly saving URIs (Daniel Veillard),<br/> 735 wrong error column in structured error when parsing attribute values (Juergen Keil),<br/> 736 wrong error column in structured error when skipping whitespace in xml decl (Juergen Keil),<br/> 737 no error column in structured error handler for xml schema validation errors (Juergen Keil),<br/> 738 Couple of Missing Null checks (Gaurav Gupta),<br/> 739 Add couple of missing Null checks (Daniel Veillard),<br/> 740 xmlschemastypes: Fix potential array overflow (Philip Withnall),<br/> 741 runtest: Fix a memory leak on parse failure (Philip Withnall),<br/> 742 xmlIO: Fix an FD leak on gzdopen() failure (Philip Withnall),<br/> 743 xmlcatalog: Fix a memory leak on quit (Philip Withnall),<br/> 744 HTMLparser: Correctly initialise a stack allocated structure (Philip Withnall),<br/> 745 Check for tmon in _xmlSchemaDateAdd() is incorrect (David Kilzer),<br/> 746 Avoid Possible Null Pointer in trio.c (Gaurav Gupta),<br/> 747 Fix processing in SAX2 in case of an allocation failure (Daniel Veillard),<br/> 748 XML Shell command "cd" does not handle "/" at end of path (Daniel Veillard),<br/> 749 Fix various Missing Null checks (Gaurav Gupta),<br/> 750 Fix a potential NULL dereference (Daniel Veillard),<br/> 751 Add a couple of misisng check in xmlRelaxNGCleanupTree (Gaurav Gupta),<br/> 752 Add a missing argument check (Gaurav Gupta),<br/> 753 Adding a check in case of allocation error (Gaurav Gupta),<br/> 754 xmlSaveUri() incorrectly recomposes URIs with rootless paths (Dennis Filder),<br/> 755 Adding some missing NULL checks (Gaurav),<br/> 756 Fixes for xmlInitParserCtxt (Daniel Veillard),<br/> 757 Fix regressions introduced by CVE-2014-0191 patch (Daniel Veillard),<br/> 758 erroneously ignores a validation error if no error callback set (Daniel Veillard),<br/> 759 xmllint was not parsing the --c14n11 flag (Sérgio Batista),<br/> 760 Avoid Possible null pointer dereference in memory debug mode (Gaurav),<br/> 761 Avoid Double Null Check (Gaurav),<br/> 762 Restore context size and position after XPATH_OP_ARG (Nick Wellnhofer),<br/> 763 Fix xmlParseInNodeContext() if node is not element (Daniel Veillard),<br/> 764 Avoid a possible NULL pointer dereference (Gaurav),<br/> 765 Fix xmlTextWriterWriteElement when a null content is given (Daniel Veillard),<br/> 766 Fix an typo 'onrest' in htmlScriptAttributes (Daniel Veillard),<br/> 767 fixing a ptotential uninitialized access (Daniel Veillard),<br/> 768 Fix an fd leak in an error case (Daniel Veillard),<br/> 769 Missing initialization for the catalog module (Daniel Veillard),<br/> 770 Handling of XPath function arguments in error case (Nick Wellnhofer),<br/> 771 Fix a couple of missing NULL checks (Gaurav),<br/> 772 Avoid a possibility of dangling encoding handler (Gaurav),<br/> 773 Fix HTML push parser to accept HTML_PARSE_NODEFDTD (Arnold Hendriks),<br/> 774 Fix a bug loading some compressed files (Mike Alexander),<br/> 775 Fix XPath node comparison bug (Gaurav),<br/> 776 Type mismatch in xmlschemas.c (Gaurav),<br/> 777 Type mismatch in xmlschemastypes.c (Gaurav),<br/> 778 Avoid a deadcode in catalog.c (Daniel Veillard),<br/> 779 run close socket on Solaris, same as we do on other platforms (Denis Pauk),<br/> 780 Fix pointer dereferenced before null check (Gaurav),<br/> 781 Fix a potential NULL dereference in tree code (Daniel Veillard),<br/> 782 Fix potential NULL pointer dereferences in regexp code (Gaurav),<br/> 783 xmllint --pretty crashed without following numeric argument (Tim Galeckas),<br/> 784 Fix XPath expressions of the form '@ns:*' (Nick Wellnhofer),<br/> 785 Fix XPath '//' optimization with predicates (Nick Wellnhofer),<br/> 786 Clear up a potential NULL dereference (Daniel Veillard),<br/> 787 Fix a possible NULL dereference (Gaurav),<br/> 788 Avoid crash if allocation fails (Daniel Veillard),<br/> 789 Remove occasional leading space in XPath number formatting (Daniel Veillard),<br/> 790 Fix handling of mmap errors (Daniel Veillard),<br/> 791 Catch malloc error and exit accordingly (Daniel Veillard),<br/> 792 missing else in xlink.c (Ami Fischman),<br/> 793 Fix a parsing bug on non-ascii element and CR/LF usage (Daniel Veillard),<br/> 794 Fix a regression in xmlGetDocCompressMode() (Daniel Veillard),<br/> 795 properly quote the namespace uris written out during c14n (Aleksey Sanin),<br/> 796 Remove premature XInclude check on URI being relative (Alexey Neyman),<br/> 797 Fix missing break on last() function for attributes (dcb),<br/> 798 Do not URI escape in server side includes (Romain Bondue),<br/> 799 Fix an error in xmlCleanupParser (Alexander Pastukhov)<br/> 800 </li> 801 802 <li>Documentation:<br/> 803 typo in error messages "colon are forbidden from..." (Daniel Veillard),<br/> 804 Fix a link to James SAX documentation old page (Daniel Veillard),<br/> 805 Fix typos in relaxng.c (Jan Pokorný),<br/> 806 Fix a doc typo (Daniel Veillard),<br/> 807 Fix typos in {tree,xpath}.c (errror) (Jan Pokorný),<br/> 808 Add limitations about encoding conversion (Daniel Veillard),<br/> 809 Fix typos in xmlschemas{,types}.c (Jan Pokorný),<br/> 810 Fix incorrect spelling entites->entities (Jan Pokorný),<br/> 811 Forgot to document 2.9.1 release, regenerate docs (Daniel Veillard)<br/> 812 </li> 813 814 <li>Portability:<br/> 815 AC_CONFIG_FILES and executable bit (Roumen Petrov),<br/> 816 remove HAVE_CONFIG_H dependency in testlimits.c (Roumen Petrov),<br/> 817 fix some tabs mixing incompatible with python3 (Roumen Petrov),<br/> 818 Visual Studio 14 CTP defines snprintf() (Francis Dupont),<br/> 819 OS400: do not try to copy unexisting doc files (Patrick Monnerat),<br/> 820 OS400: use either configure.ac or configure.in. (Patrick Monnerat),<br/> 821 os400: make-src.sh: create physical file with target CCSID (Patrick Monnerat),<br/> 822 OS400: Add some more C macros equivalent procedures. (Patrick Monnerat),<br/> 823 OS400: use C macros to implement equivalent RPG support procedures. (Patrick Monnerat),<br/> 824 OS400: implement XPath macros as procedures for ILE/RPG support. (Patrick Monnerat),<br/> 825 OS400: include in distribution tarball. (Patrick Monnerat),<br/> 826 OS400: Add README: compilation directives and OS/400 specific stuff. (Patrick Monnerat),<br/> 827 OS400: Add compilation scripts. (Patrick Monnerat),<br/> 828 OS400: ILE RPG language header files. (Patrick Monnerat),<br/> 829 OS400: implement some macros as functions for ILE/RPG language support (that as no macros). (Patrick Monnerat),<br/> 830 OS400: UTF8<-->EBCDIC wrappers for system and external library calls (Patrick Monnerat),<br/> 831 OS400: Easy character transcoding support (Patrick Monnerat),<br/> 832 OS400: iconv functions compatibility wrappers and table builder. (Patrick Monnerat),<br/> 833 OS400: create architecture directory. Implement dlfcn emulation. (Patrick Monnerat),<br/> 834 Fix building when configuring without xpath and xptr (Daniel Veillard),<br/> 835 configure: Add --with-python-install-dir (Jonas Eriksson),<br/> 836 Fix compilation with minimum and xinclude. (Nicolas Le Cam),<br/> 837 Compile out use of xmlValidateNCName() when not available. (Nicolas Le Cam),<br/> 838 Fix compilation with minimum and schematron. (Nicolas Le Cam),<br/> 839 Legacy needs xmlSAX2StartElement() and xmlSAX2EndElement(). (Nicolas Le Cam),<br/> 840 Don't use xmlValidateName() when not available. (Nicolas Le Cam),<br/> 841 Fix a portability issue on Windows (Longstreth Jon),<br/> 842 Various portability patches for OpenVMS (Jacob (Jouk) Jansen),<br/> 843 Use specific macros for portability to OS/400 (Patrick Monnerat),<br/> 844 Add macros needed for OS/400 portability (Patrick Monnerat),<br/> 845 Portability patch for fopen on OS/400 (Patrick Monnerat),<br/> 846 Portability fixes for OS/400 (Patrick Monnerat),<br/> 847 Improve va_list portability (Patrick Monnerat),<br/> 848 Portability fix (Patrick Monnerat),<br/> 849 Portability fix (Patrick Monnerat),<br/> 850 Generic portability fix (Patrick Monnerat),<br/> 851 Shortening lines in headers (Patrick Monnerat),<br/> 852 build: Use pkg-config to find liblzma in preference to AC_CHECK_LIB (Philip Withnall),<br/> 853 build: Add @LZMA_LIBS@ to libxml’s pkg-config files (Philip Withnall),<br/> 854 fix some tabs mixing incompatible with python3 (Daniel Veillard),<br/> 855 add additional defines checks for support "./configure --with-minimum" (Denis Pauk),<br/> 856 Another round of fixes for older versions of Python (Arfrever Frehtes Taifersar Arahesis),<br/> 857 python: fix drv_libxml2.py for python3 compatibility (Alexandre Rostovtsev),<br/> 858 python: Fix compiler warnings when building python3 bindings (Armin K),<br/> 859 Fix for compilation with python 2.6.8 (Petr Sumbera)<br/> 860 </li> 861 862 <li>Improvements:<br/> 863 win32/libxml2.def.src after rebuild in doc (Roumen Petrov),<br/> 864 elfgcchack.h: more legacy needs xmlSAX2StartElement() and xmlSAX2EndElement() (Roumen Petrov),<br/> 865 elfgcchack.h: add xmlXPathNodeEval and xmlXPathSetContextNode (Roumen Petrov),<br/> 866 Provide cmake module (Samuel Martin),<br/> 867 Fix a couple of issues raised by make dist (Daniel Veillard),<br/> 868 Fix and add const qualifiers (Kurt Roeckx),<br/> 869 Preparing for upcoming release of 2.9.2 (Daniel Veillard),<br/> 870 Fix zlib and lzma libraries check via command line (Dmitriy),<br/> 871 wrong error column in structured error when parsing end tag (Juergen Keil),<br/> 872 doc/news.html: small update to avoid line join while generating NEWS. (Patrick Monnerat),<br/> 873 Add methods for python3 iterator (Ron Angeles),<br/> 874 Support element node traversal in document fragments. (Kyle VanderBeek),<br/> 875 xmlNodeSetName: Allow setting the name to a substring of the currently set name (Tristan Van Berkom),<br/> 876 Added macros for argument casts (Eric Zurcher),<br/> 877 adding init calls to xml and html Read parsing entry points (Daniel Veillard),<br/> 878 Get rid of 'REPLACEMENT CHARACTER' Unicode chars in xmlschemas.c (Jan Pokorný),<br/> 879 Implement choice for name classes on attributes (Shaun McCance),<br/> 880 Two small namespace tweaks (Daniel Veillard),<br/> 881 xmllint --memory should fail on empty files (Daniel Veillard),<br/> 882 Cast encoding name to char pointer to match arg type (Nikolay Sivov)<br/> 883 </li> 884 885 <li>Cleanups:<br/> 886 Removal of old configure.in (Daniel Veillard),<br/> 887 Unreachable code in tree.c (Gaurav Gupta),<br/> 888 Remove a couple of dead conditions (Gaurav Gupta),<br/> 889 Avoid some dead code and cleanup in relaxng.c (Gaurav),<br/> 890 Drop not needed checks (Denis Pauk),<br/> 891 Fix a wrong test (Daniel Veillard)<br/> 892 </li> 893</ul> 894<h3>2.9.1: Apr 19 2013</h3> 895<ul> 896 <li> Features:<br/> 897 Support for Python3 (Daniel Veillard),<br/> 898 Add xmlXPathSetContextNode and xmlXPathNodeEval (Alex Bligh)<br/> 899 </li> 900 901 <li> Documentation:<br/> 902 Add documentation for xmllint --xpath (Daniel Veillard),<br/> 903 Fix the URL of the SAX documentation from James (Daniel Veillard),<br/> 904 Fix spelling of "length". (Michael Wood)<br/> 905 </li> 906 907 <li> Portability:<br/> 908 Fix python bindings with versions older than 2.7 (Daniel Veillard),<br/> 909 rebuild docs:Makefile.am (Roumen Petrov),<br/> 910 elfgcchack.h after rebuild in doc (Roumen Petrov),<br/> 911 elfgcchack for buf module (Roumen Petrov),<br/> 912 Fix a uneeded and wrong extra link parameter (Daniel Veillard),<br/> 913 Few cleanup patches for Windows (Denis Pauk),<br/> 914 Fix rpmbuild --nocheck (Mark Salter),<br/> 915 Fix for win32/configure.js and WITH_THREAD_ALLOC (Daniel Richard),<br/> 916 Fix Broken multi-arch support in xml2-config (Daniel Veillard),<br/> 917 Fix a portability issue for GCC < 3.4.0 (Daniel Veillard),<br/> 918 Windows build fixes (Daniel Richard),<br/> 919 Fix a thread portability problem (Friedrich Haubensak),<br/> 920 Downgrade autoconf requirement to 2.63 (Daniel Veillard)<br/> 921 </li> 922 923 <li> Bug Fixes:<br/> 924 Fix a linking error for python bindings (Daniel Veillard),<br/> 925 Fix a couple of return without value (Jüri Aedla),<br/> 926 Improve the hashing functions (Daniel Franke),<br/> 927 Improve handling of xmlStopParser() (Daniel Veillard),<br/> 928 Remove risk of lockup in dictionary initialization (Daniel Veillard),<br/> 929 Activate detection of encoding in external subset (Daniel Veillard),<br/> 930 Fix an output buffer flushing conversion bug (Mikhail Titov),<br/> 931 Fix an old bug in xmlSchemaValidateOneElement (Csaba László),<br/> 932 Fix configure cannot remove messages (Gilles Espinasse),<br/> 933 fix schema validation in combination with xsi:nil (Daniel Veillard),<br/> 934 xmlCtxtReadFile doesn't work with literal IPv6 URLs (Steve Wolf),<br/> 935 Fix a few problems with setEntityLoader (Alexey Neyman),<br/> 936 Detect excessive entities expansion upon replacement (Daniel Veillard),<br/> 937 Fix the flushing out of raw buffers on encoding conversions (Daniel,<br/> 938Veillard),<br/> 939 Fix some buffer conversion issues (Daniel Veillard),<br/> 940 When calling xmlNodeDump make sure we grow the buffer quickly (Daniel,<br/> 941Veillard),<br/> 942 Fix an error in the progressive DTD parsing code (Dan Winship),<br/> 943 xmllint should not load DTD by default when using the reader (Daniel,<br/> 944Veillard),<br/> 945 Try IBM-037 when looking for EBCDIC handlers (Petr Sumbera),<br/> 946 Fix potential out of bound access (Daniel Veillard),<br/> 947 Fix large parse of file from memory (Daniel Veillard),<br/> 948 Fix a bug in the nsclean option of the parser (Daniel Veillard),<br/> 949 Fix a regression in 2.9.0 breaking validation while streaming (Daniel,<br/> 950Veillard),<br/> 951 Remove potential calls to exit() (Daniel Veillard)<br/> 952 </li> 953 954 <li> Improvements:<br/> 955 Regenerated API, and testapi, rebuild documentation (Daniel Veillard),<br/> 956 Fix tree iterators broken by 2to3 script (Daniel Veillard),<br/> 957 update all tests for Python3 and Python2 (Daniel Veillard),<br/> 958 A few more fixes for python 3 affecting libxml2.py (Daniel Veillard),<br/> 959 Fix compilation on Python3 (Daniel Veillard),<br/> 960 Converting apibuild.py to python3 (Daniel Veillard),<br/> 961 First pass at starting porting to python3 (Daniel Veillard),<br/> 962 updated configure.in for python3 (Daniel Veillard),<br/> 963 Add support for xpathRegisterVariable in Python (Shaun McCance),<br/> 964 Added a regression tests from bug 694228 data (Daniel Veillard),<br/> 965 Cache presence of '<' in entities content (Daniel Veillard),<br/> 966 Avoid extra processing on entities (Daniel Veillard),<br/> 967 Python binding for xmlRegisterInputCallback (Alexey Neyman),<br/> 968 Python bindings: DOM casts everything to xmlNode (Alexey Neyman),<br/> 969 Define LIBXML_THREAD_ALLOC_ENABLED via xmlversion.h (Tim Starling),<br/> 970 Adding streaming validation to runtest checks (Daniel Veillard),<br/> 971 Add a --pushsmall option to xmllint (Daniel Veillard)<br/> 972 </li> 973 974 <li> Cleanups:<br/> 975 Switched comment in file to UTF-8 encoding (Daniel Veillard),<br/> 976 Extend gitignore (Daniel Veillard),<br/> 977 Silent the new python test on input (Alexey Neyman),<br/> 978 Cleanup of a duplicate test (Daniel Veillard),<br/> 979 Cleanup on duplicate test expressions (Daniel Veillard),<br/> 980 Fix compiler warning after 153cf15905cf4ec080612ada6703757d10caba1e (Patrick,<br/> 981Gansterer),<br/> 982 Spec cleanups and a fix for multiarch support (Daniel Veillard),<br/> 983 Silence a clang warning (Daniel Veillard),<br/> 984 Cleanup the Copyright to be pure MIT Licence wording (Daniel Veillard),<br/> 985 rand_seed should be static in dict.c (Wouter Van Rooy),<br/> 986 Fix typos in parser comments (Jan Pokorný)<br/> 987 </li> 988</ul> 989<h3>2.9.0: Sep 11 2012</h3> 990<ul> 991 <li> Features:<br/> 992 A few new API entry points,<br/> 993 More resilient push parser mode,<br/> 994 A lot of portability improvement,<br/> 995 Faster XPath evaluation<br/> 996 </li> 997 998 <li> Documentation:<br/> 999 xml2-config.1 markup error (Christian Weisgerber),<br/> 1000 libxml(3) manpage typo fix (John Bradshaw),<br/> 1001 More cleanups to the documentation part of libxml2 (Daniel Richard G)<br/> 1002 </li> 1003 1004 <li> Portability:<br/> 1005 Bug 676544 - fails to build with --without-sax1 (Akira TAGOH),<br/> 1006 fix builds not having stdint.h (Rob Richards),<br/> 1007 GetProcAddressA is available only on WinCE (Daniel Veillard),<br/> 1008 More updates and cleanups on autotools and Makefiles (Daniel Richard G),<br/> 1009 More changes for Win32 compilation (Eric Zurcher),<br/> 1010 Basic changes for Win32 builds of release 2.9.0: compile buf.c (Eric Zurcher),<br/> 1011 Bundles all generated files for python into the distribution (Daniel Richard G),<br/> 1012 Fix compiler warnings of wincecompat.c (Patrick Gansterer),<br/> 1013 Fix non __GNUC__ build (Patrick Gansterer),<br/> 1014 Fix windows unicode build (Patrick Gansterer),<br/> 1015 clean redefinition of {v}snprintf in C-source (Roumen Petrov),<br/> 1016 use xmlBuf... if DEBUG_INPUT is defined (Roumen Petrov),<br/> 1017 fix runtests to use pthreads support for various Unix platforms (Daniel Richard G),<br/> 1018 Various "make distcheck" and portability fixups 2nd part (Daniel Richard G),<br/> 1019 Various "make distcheck" and portability fixups (Daniel Richard G),<br/> 1020 Fix compilation on older Visual Studio (Daniel Veillard)<br/> 1021 </li> 1022 1023 <li> Bug Fixes:<br/> 1024 Change the XPath code to percolate allocation errors (Daniel Veillard),<br/> 1025 Fix reuse of xmlInitParser (Daniel Veillard),<br/> 1026 Fix potential crash on entities errors (Daniel Veillard),<br/> 1027 initialize var (Rob Richards),<br/> 1028 Fix the XPath arity check to also check the XPath stack limits (Daniel Veillard),<br/> 1029 Fix problem with specific and generic error handlers (Pietro Cerutti),<br/> 1030 Avoid a potential infinite recursion (Daniel Veillard),<br/> 1031 Fix an XSD error when generating internal automata (Daniel Veillard),<br/> 1032 Patch for xinclude of text using multibyte characters (Vitaly Ostanin),<br/> 1033 Fix a segfault on XSD validation on pattern error (Daniel Veillard),<br/> 1034 Fix missing xmlsave.h module which was ignored in recent builds (Daniel Veillard),<br/> 1035 Add a missing element check (Daniel Veillard),<br/> 1036 Adding various checks on node type though the API (Daniel Veillard),<br/> 1037 Namespace nodes can't be unlinked with xmlUnlinkNode (Daniel Veillard),<br/> 1038 Fix make dist to include new private header files (Daniel Veillard),<br/> 1039 More fixups on the push parser behaviour (Daniel Veillard),<br/> 1040 Strengthen behaviour of the push parser in problematic situations (Daniel Veillard),<br/> 1041 Enforce XML_PARSER_EOF state handling through the parser (Daniel Veillard),<br/> 1042 Fixup limits parser (Daniel Veillard),<br/> 1043 Do not fetch external parsed entities (Daniel Veillard),<br/> 1044 Fix an error in previous commit (Aron Xu),<br/> 1045 Fix entities local buffers size problems (Daniel Veillard),<br/> 1046 Fix parser local buffers size problems (Daniel Veillard),<br/> 1047 Fix a failure to report xmlreader parsing failures (Daniel Veillard)<br/> 1048 </li> 1049 1050 <li> Improvements:<br/> 1051 Keep libxml2.syms when running "make distclean" (Daniel Veillard),<br/> 1052 Allow to set the quoting character of an xmlWriter (Csaba Raduly),<br/> 1053 Keep non-significant blanks node in HTML parser (Daniel Veillard),<br/> 1054 Add a forbidden variable error number and message to XPath (Daniel Veillard),<br/> 1055 Support long path names on WNT (Michael Stahl),<br/> 1056 Improve HTML escaping of attribute on output (Daniel Veillard),<br/> 1057 Handle ICU_LIBS as LIBADD, not LDFLAGS to prevent linking errors (Arfrever Frehtes Taifersar Arahesis),<br/> 1058 Switching XPath node sorting to Timsort (Vojtech Fried),<br/> 1059 Optimizing '//' in XPath expressions (Nick Wellnhofer),<br/> 1060 Expose xmlBufShrink in the public tree API (Daniel Veillard),<br/> 1061 Visible HTML elements close the head tag (Conrad Irwin),<br/> 1062 Fix file and line report for XSD SAX and reader streaming validation (Daniel Veillard),<br/> 1063 Fix const qualifyer to definition of xmlBufferDetach (Daniel Veillard),<br/> 1064 minimize use of HAVE_CONFIG_H (Roumen Petrov),<br/> 1065 fixup regression in Various "make distcheck" and portability fixups (Roumen Petrov),<br/> 1066 Add support for big line numbers in error reporting (Daniel Veillard),<br/> 1067 Avoid using xmlBuffer for serialization (Daniel Veillard),<br/> 1068 Improve compatibility between xmlBuf and xmlBuffer (Daniel Veillard),<br/> 1069 Provide new accessors for xmlOutputBuffer (Daniel Veillard),<br/> 1070 Improvements for old buffer compatibility (Daniel Veillard),<br/> 1071 Expand the limit test program (Daniel Veillard),<br/> 1072 Improve error reporting on parser errors (Daniel Veillard),<br/> 1073 Implement some default limits in the XPath module (Daniel Veillard),<br/> 1074 Introduce some default parser limits (Daniel Veillard),<br/> 1075 Cleanups and new limit APIs for dictionaries (Daniel Veillard),<br/> 1076 Fixup for buf.c (Daniel Veillard),<br/> 1077 Cleanup URI module memory allocation code (Daniel Veillard),<br/> 1078 Extend testlimits (Daniel Veillard),<br/> 1079 More avoid quadratic behaviour (Daniel Veillard),<br/> 1080 Impose a reasonable limit on PI size (Daniel Veillard),<br/> 1081 first version of testlimits new test (Daniel Veillard),<br/> 1082 Avoid quadratic behaviour in some push parsing cases (Daniel Veillard),<br/> 1083 Impose a reasonable limit on comment size (Daniel Veillard),<br/> 1084 Impose a reasonable limit on attribute size (Daniel Veillard),<br/> 1085 Harden the buffer code and make it more compatible (Daniel Veillard),<br/> 1086 More cleanups for input/buffers code (Daniel Veillard),<br/> 1087 Cleanup function xmlBufResetInput(),<br/> to set input from Buffer (Daniel Veillard) 1088 Swicth the test program for characters to new input buffers (Daniel Veillard),<br/> 1089 Convert the HTML tree module to the new buffers (Daniel Veillard),<br/> 1090 Convert of the HTML parser to new input buffers (Daniel Veillard),<br/> 1091 Convert the writer to new output buffer and save APIs (Daniel Veillard),<br/> 1092 Convert XMLReader to the new input buffers (Daniel Veillard),<br/> 1093 New saving functions using xmlBuf and conversion (Daniel Veillard),<br/> 1094 Provide new xmlBuf based saving functions (Daniel Veillard),<br/> 1095 Convert XInclude to the new input buffers (Daniel Veillard),<br/> 1096 Convert catalog code to the new input buffers (Daniel Veillard),<br/> 1097 Convert C14N to the new Input buffer (Daniel Veillard),<br/> 1098 Convert xmlIO.c to the new input and output buffers (Daniel Veillard),<br/> 1099 Convert XML parser to the new input buffers (Daniel Veillard),<br/> 1100 Incompatible change to the Input and Output buffers (Daniel Veillard),<br/> 1101 Adding new encoding function to deal with the new structures (Daniel Veillard),<br/> 1102 Convert XPath to xmlBuf (Daniel Veillard),<br/> 1103 Adding a new buf module for buffers (Daniel Veillard),<br/> 1104 Memory error within SAX2 reuse common framework (Daniel Veillard),<br/> 1105 Fix xmllint --xpath node initialization (Daniel Veillard)<br/> 1106 </li> 1107 1108 <li> Cleanups:<br/> 1109 Various cleanups to avoid compiler warnings (Daniel Veillard),<br/> 1110 Big space and tab cleanup (Daniel Veillard),<br/> 1111 Followup to LibXML2 docs/examples cleanup patch (Daniel Veillard),<br/> 1112 Second round of cleanups for LibXML2 docs/examples (Daniel Richard),<br/> 1113 Remove all .cvsignore as they are not used anymore (Daniel Veillard),<br/> 1114 Fix a Timsort function helper comment (Daniel Veillard),<br/> 1115 Small cleanup for valgrind target (Daniel Veillard),<br/> 1116 Patch for portability of latin characters in C files (Daniel Veillard),<br/> 1117 Cleanup some of the parser code (Daniel Veillard),<br/> 1118 Fix a variable name in comment (Daniel Veillard),<br/> 1119 Regenerated testapi.c (Daniel Veillard),<br/> 1120 Regenerating docs and API files (Daniel Veillard),<br/> 1121 Small cleanup of unused variables in test (Daniel Veillard),<br/> 1122 Expand .gitignore with more files (Daniel Veillard)<br/> 1123 </li> 1124</ul> 1125<h3>2.8.0: May 23 2012</h3> 1126<ul> 1127 <li>Features: 1128 add lzma compression support (Anders F Bjorklund) 1129 </li> 1130 1131 <li>Documentation: 1132 xmlcatalog: Add uri and delegateURI to possible add types in man page. (Ville Skyttä), 1133 Update README.tests (Daniel Veillard), 1134 URI handling code is not OOM resilient (Daniel Veillard), 1135 Fix an error in comment (Daniel Veillard), 1136 Fixed bug #617016 (Daniel Mustieles), 1137 Fixed two typos in the README document (Daniel Neel), 1138 add generated html files (Anders F Bjorklund), 1139 Clarify the need to use xmlFreeNode after xmlUnlinkNode (Daniel Veillard), 1140 Improve documentation a bit (Daniel Veillard), 1141 Updated URL for lxml python bindings (Daniel Veillard) 1142 </li> 1143 1144 <li>Portability: 1145 Restore code for Windows compilation (Daniel Veillard), 1146 Remove git error message during configure (Christian Dywan), 1147 xmllint: Build fix for endTimer if !defined(HAVE_GETTIMEOFDAY) (Patrick R. Gansterer), 1148 remove a bashism in confgure.in (John Hein), 1149 undef ERROR if already defined (Patrick R. Gansterer), 1150 Fix library problems with mingw-w64 (Michael Cronenworth), 1151 fix windows build. ifdef addition from bug 666491 makes no sense (Rob Richards), 1152 prefer native threads on win32 (Sam Thursfield), 1153 Allow to compile with Visual Studio 2010 (Thomas Lemm), 1154 Fix mingw's snprintf configure check (Andoni Morales), 1155 fixed a 64bit big endian issue (Marcus Meissner), 1156 Fix portability failure if netdb.h lacks NO_ADDRESS (Daniel Veillard), 1157 Fix windows build from lzma addition (Rob Richards), 1158 autogen: Only check for libtoolize (Colin Walters), 1159 Fix the Windows build files (Patrick von Reth), 1160 634846 Remove a linking option breaking Windows VC10 (Daniel Veillard), 1161 599241 fix an initialization problem on Win64 (Andrew W. Nosenko), 1162 fix win build (Rob Richards) 1163 </li> 1164 1165 <li>Bug fixes: 1166 Part for rand_r checking missing (Daniel Veillard), 1167 Cleanup on randomization (Daniel Veillard), 1168 Fix undefined reference in python module (Pacho Ramos), 1169 Fix a race in xmlNewInputStream (Daniel Veillard), 1170 Fix weird streaming RelaxNG errors (Noam), 1171 Fix various bugs in new code raised by the API checking (Daniel Veillard), 1172 Fix various problems with "make dist" (Daniel Veillard), 1173 Fix a memory leak in the xzlib code (Daniel Veillard), 1174 HTML parser error with <noscript> in the <head> (Denis Pauk), 1175 XSD: optional element in complex type extension (Remi Gacogne), 1176 Fix html serialization error and htmlSetMetaEncoding() (Daniel Veillard), 1177 Fix a wrong return value in previous patch (Daniel Veillard), 1178 Fix an uninitialized variable use (Daniel Veillard), 1179 Fix a compilation problem with --minimum (Brandon Slack), 1180 Remove redundant and ungarded include of resolv.h (Daniel Veillard), 1181 xinclude with parse="text" does not use the entity loader (Shaun McCance), 1182 Allow to parse 1 byte HTML files (Denis Pauk), 1183 Patch that fixes the skipping of the HTML_PARSE_NOIMPLIED flag (Martin Schröder), 1184 Avoid memory leak if xmlParserInputBufferCreateIO fails (Lin Yi-Li), 1185 Prevent an infinite loop when dumping a node with encoding problems (Timothy Elliott), 1186 xmlParseNodeInContext problems with an empty document (Tim Elliott), 1187 HTML element position is not detected propperly (Pavel Andrejs), 1188 Fix an off by one pointer access (Jüri Aedla), 1189 Try to fix a problem with entities in SAX mode (Daniel Veillard), 1190 Fix a crash with xmllint --path on empty results (Daniel Veillard), 1191 Fixed bug #667946 (Daniel Mustieles), 1192 Fix a logic error in Schemas Component Constraints (Ryan Sleevi), 1193 Fix a wrong enum type use in Schemas Types (Nico Weber), 1194 Fix SAX2 builder in case of undefined attributes namespace (Daniel Veillard), 1195 Fix SAX2 builder in case of undefined element namespaces (Daniel Veillard), 1196 fix reference to STDOUT_FILENO on MSVC (Tay Ray Chuan), 1197 fix a pair of possible out of array char references (Daniel Veillard), 1198 Fix an allocation error when copying entities (Daniel Veillard), 1199 Make sure the parser returns when getting a Stop order (Chris Evans), 1200 Fix some potential problems on reallocation failures(parser.c) (Xia Xinfeng), 1201 Fix a schema type duration comparison overflow (Daniel Veillard), 1202 Fix an unimplemented part in RNG value validation (Daniel Veillard), 1203 Fix missing error status in XPath evaluation (Daniel Veillard), 1204 Hardening of XPath evaluation (Daniel Veillard), 1205 Fix an off by one error in encoding (Daniel Veillard), 1206 Fix RELAX NG include bug #655288 (Shaun McCance), 1207 Fix XSD validation bug #630130 (Toyoda Eizi), 1208 Fix some potential problems on reallocation failures (Chris Evans), 1209 __xmlRaiseError: fix use of the structured callback channel (Dmitry V. Levin), 1210 __xmlRaiseError: fix the structured callback channel's data initialization (Dmitry V. Levin), 1211 Fix memory corruption when xmlParseBalancedChunkMemoryInternal is called from xmlParseBalancedChunk (Rob Richards), 1212 Small fix for previous commit (Daniel Veillard), 1213 Fix a potential freeing error in XPath (Daniel Veillard), 1214 Fix a potential memory access error (Daniel Veillard), 1215 Reactivate the shared library versionning script (Daniel Veillard) 1216 </li> 1217 1218 <li>Improvements: 1219 use mingw C99 compatible functions {v}snprintf instead those from MSVC runtime (Roumen Petrov), 1220 New symbols added for the next release (Daniel Veillard), 1221 xmlTextReader bails too quickly on error (Andy Lutomirski), 1222 Use a hybrid allocation scheme in xmlNodeSetContent (Conrad Irwin), 1223 Use buffers when constructing string node lists. (Conrad Irwin), 1224 Add HTML parser support for HTML5 meta charset encoding declaration (Denis Pauk), 1225 wrong message for double hyphen in comment XML error (Bryan Henderson), 1226 Fix "make tst" to grab lzma lib too (Daniel Veillard), 1227 Add "whereis" command to xmllint shell (Ryan), 1228 Improve xmllint shell (Ryan), 1229 add function xmlTextReaderRelaxNGValidateCtxt() (Noam Postavsky), 1230 Add --system support to autogen.sh (Daniel Veillard), 1231 Add hash randomization to hash and dict structures (Daniel Veillard), 1232 included xzlib in dist (Anders F Bjorklund), 1233 move xz/lzma helpers to separate included files (Anders F Bjorklund), 1234 add generated devhelp files (Anders F Bjorklund), 1235 add XML_WITH_LZMA to api (Anders F Bjorklund), 1236 autogen.sh: Honor NOCONFIGURE environment variable (Colin Walters), 1237 Improve the error report on undefined REFs (Daniel Veillard), 1238 Add exception for new W3C PI xml-model (Daniel Veillard), 1239 Add options to ignore the internal encoding (Daniel Veillard), 1240 testapi: use the right type for the check (Stefan Kost), 1241 various: handle return values of write calls (Stefan Kost), 1242 testWriter: xmlTextWriterWriteFormatElement wants an int instead of a long int (Stefan Kost), 1243 runxmlconf: update to latest testsuite version (Stefan Kost), 1244 configure: add -Wno-long-long to CFLAGS (Stefan Kost), 1245 configure: support silent automake rules if possible (Stefan Kost), 1246 xmlmemory: add a cast as size_t has no portable printf modifier (Stefan Kost), 1247 __xmlRaiseError: remove redundant schannel initialization (Dmitry V. Levin), 1248 __xmlRaiseError: do cheap code check early (Dmitry V. Levin) 1249 </li> 1250 1251 <li>Cleanups: 1252 Cleanups before 2.8.0-rc2 (Daniel Veillard), 1253 Avoid an extra operation (Daniel Veillard), 1254 Remove vestigial de-ANSI-fication support. (Javier Jardón), 1255 autogen.sh: Fix typo (Javier Jardón), 1256 Do not use unsigned but unsigned int (Daniel Veillard), 1257 Remove two references to u_short (Daniel Veillard), 1258 Fix -Wempty-body warning from clang (Nico Weber), 1259 Cleanups of lzma support (Daniel Veillard), 1260 Augment the list of ignored files (Daniel Veillard), 1261 python: remove unused variable (Stefan Kost), 1262 python: flag two unused args (Stefan Kost), 1263 configure: acconfig.h is deprecated since autoconf-2.50 (Stefan Kost), 1264 xpath: remove unused variable (Stefan Kost) 1265 </li> 1266</ul> 1267<h3>2.7.8: Nov 4 2010</h3> 1268<ul> 1269 <li> Features: 1270 480323 add code to plug in ICU converters by default (Giuseppe Iuculano), 1271 Add xmlSaveOption XML_SAVE_WSNONSIG (Adam Spragg) 1272 </li> 1273 <li> Documentation: 1274 Fix devhelp documentation installation (Mike Hommey), 1275 Fix web site encoding problems (Daniel Veillard), 1276 Fix a couple of typo in HTML parser error messages (Michael Day), 1277 Forgot to update the news page for 0.7.7 (Daniel Veillard) 1278 </li> 1279 <li> Portability: 1280 607273 Fix python detection on MSys/Windows (LRN), 1281 614087 Fix Socket API usage to allow Windows64 compilation (Ozkan Sezer), 1282 Fix compilation with Clang (Koop Mast), 1283 Fix Win32 build (Rob Richards) 1284 </li> 1285 <li> Bug Fixes: 1286 595789 fix a remaining potential Solaris problem (Daniel Veillard), 1287 617468 fix progressive HTML parsing with style using "'" (Denis Pauk), 1288 616478 Fix xmllint shell write command (Gwenn Kahz), 1289 614005 Possible erroneous HTML parsing on unterminated script (Pierre Belzile), 1290 627987 Fix XSD IDC errors in imported schemas (Jim Panetta), 1291 629325 XPath rounding errors first cleanup (Phil Shafer), 1292 630140 fix iso995x encoding error (Daniel Veillard), 1293 make sure htmlCtxtReset do reset the disableSAX field (Daniel Veillard), 1294 Fix a change of semantic on XPath preceding and following axis (Daniel Veillard), 1295 Fix a potential segfault due to weak symbols on pthreads (Mike Hommey), 1296 Fix a leak in XPath compilation (Daniel Veillard), 1297 Fix the semantic of XPath axis for namespace/attribute context nodes (Daniel Veillard), 1298 Avoid a descriptor leak in catalog loading code (Carlo Bramini), 1299 Fix a small bug in XPath evaluation code (Marius Wachtler), 1300 Fix handling of XML-1.0 XML namespace declaration (Daniel Veillard), 1301 Fix errors in XSD double validation check (Csaba Raduly), 1302 Fix handling of apos in URIs (Daniel Veillard), 1303 xmlTextReaderReadOuterXml should handle DTD (Rob Richards), 1304 Autogen.sh needs to create m4 directory (Rob Richards) 1305 </li> 1306 <li> Improvements: 1307 606592 update language ID parser to RFC 5646 (Daniel Veillard), 1308 Sort python generated stubs (Mike Hommey), 1309 Add an HTML parser option to avoid a default doctype (Daniel Veillard) 1310 </li> 1311 <li> Cleanups: 1312 618831 don't ship generated files in git (Adrian Bunk), 1313 Switch from the obsolete mkinstalldirs to AC_PROG_MKDIR_P (Adrian Bunk), 1314 Various cleanups on encoding handling (Daniel Veillard), 1315 Fix xmllint to use format=1 for default formatting (Adam Spragg), 1316 Force _xmlSaveCtxt.format to be 0 or 1 (Adam Spragg), 1317 Cleanup encoding pointer comparison (Nikolay Sivov), 1318 Small code cleanup on previous patch (Daniel Veillard) 1319 </li> 1320</ul> 1321<h3>2.7.7: Mar 15 2010</h3> 1322<ul> 1323 <li> Improvements: 1324 Adding a --xpath option to xmllint (Daniel Veillard), 1325 Make HTML parser non-recursive (Eugene Pimenov) 1326 </li> 1327 <li> Portability: 1328 relaxng.c: cast to allow compilation with sun studio 11 (Ben Walton), 1329 Fix build failure on Sparc solaris (Roumen Petrov), 1330 use autoreconf in autogen.sh (Daniel Veillard), 1331 Fix build with mingw (Roumen Petrov), 1332 Upgrade some of the configure and autogen (Daniel Veillard), 1333 Fix relaxNG tests in runtest for Windows runtest.c: initialize ret (Rob Richards), 1334 Fix a const warning in xmlNodeSetBase (Martin Trappel), 1335 Fix python generator to not use deprecated xmllib (Daniel Veillard), 1336 Update some automake files (Daniel Veillard), 1337 598785 Fix nanohttp on Windows (spadix) 1338 </li> 1339 <li> Bug Fixes: 1340 libxml violates the zlib interface and crashes (Mark Adler), 1341 Fix broken escape behaviour in regexp ranges (Daniel Veillard), 1342 Fix missing win32 libraries in libxml-2.0.pc (Volker Grabsch), 1343 Fix detection of python linker flags (Daniel Macks), 1344 fix build error in libxml2/python (Paul Smith), 1345 ChunkParser: Incorrect decoding of small xml files (Raul Hudea), 1346 htmlCheckEncoding doesn't update input-end after shrink (Eugene Pimenov), 1347 Fix a missing #ifdef (Daniel Veillard), 1348 Fix encoding selection for xmlParseInNodeContext (Daniel Veillard), 1349 xmlPreviousElementSibling mistake (François Delyon), 1350 608773 add a missing check in xmlGROW (Daniel Veillard), 1351 Fix xmlParseInNodeContext for HTML content (Daniel Veillard), 1352 Fix lost namespace when copying node * tree.c: reconcile namespace if not found (Rob Richards), 1353 Fix some missing commas in HTML element lists (Eugene Pimenov), 1354 Correct variable type to unsigned (Nikolay Sivov), 1355 Recognize ID attribute in HTML without DOCTYPE (Daniel Veillard), 1356 Fix memory leak in xmlXPathEvalExpression() (Martin), 1357 Fix an init bug in global.c (Kai Henning), 1358 Fix xmlNodeSetBase() comment (Daniel Veillard), 1359 Fix broken escape behaviour in regexp ranges (Daniel Veillard), 1360 Don't give default HTML boolean attribute values in parser (Daniel Veillard), 1361 xmlCtxtResetLastError should reset ctxt-errNo (Daniel Veillard) 1362 </li> 1363 <li> Cleanups: 1364 Cleanup a couple of weirdness in HTML parser (Eugene Pimenov) 1365 </li> 1366</ul> 1367<h3>2.7.6: Oct 6 2009</h3> 1368<ul> 1369 <li> Bug Fixes: 1370 Restore thread support in default configuration (Andrew W. Nosenko), 1371 URI with no path parsing problem (Daniel Veillard), 1372 Minor patch for conditional defines in threads.c (Eric Zurcher) 1373 </li> 1374</ul> 1375<h3>2.7.5: Sep 24 2009</h3> 1376<ul> 1377 <li> Bug Fixes: 1378 Restore behavior of --with-threads without argument (Andrew W. Nosenko), 1379 Fix memory leak when doc is NULL (Rob Richards), 1380 595792 fixing a RelaxNG bug introduced in 2.7.4 (Daniel Veillard), 1381 Fix a Relaxng bug raised by libvirt test suite (Daniel Veillard), 1382 Fix a parsing problem with little data at startup (Daniel Veillard), 1383 link python module with python library (Frederic Crozat), 1384 594874 Forgot an fclose in xmllint (Daniel Veillard) 1385 </li> 1386 <li> Cleanup: 1387 Adding symbols.xml to EXTRA_DIST (Daniel Veillard) 1388 </li> 1389</ul> 1390<h3>2.7.4: Sep 10 2009</h3> 1391<ul> 1392 <li>Improvements: 1393 Switch to GIT (GNOME), 1394 Add symbol versioning to libxml2 shared libs (Daniel Veillard) 1395 </li> 1396 <li>Portability: 1397 593857 try to work around thread pbm MinGW 4.4 (Daniel Veillard), 1398 594250 rename ATTRIBUTE_ALLOC_SIZE to avoid clashes (Daniel Veillard), 1399 Fix Windows build * relaxng.c: fix windows build (Rob Richards), 1400 Fix the globals.h to use XMLPUBFUN (Paul Smith), 1401 Problem with extern extern in header (Daniel Veillard), 1402 Add -lnetwork for compiling on Haiku (Scott McCreary), 1403 Runtest portability patch for Solaris (Tim Rice), 1404 Small patch to accomodate the Haiku OS (Scott McCreary), 1405 584605 package VxWorks folder in the distribution (Daniel Veillard), 1406 574017 Realloc too expensive on most platform (Daniel Veillard), 1407 Fix windows build (Rob Richards), 1408 545579 doesn't compile without schema support (Daniel Veillard), 1409 xmllint use xmlGetNodePath when not compiled in (Daniel Veillard), 1410 Try to avoid __imp__xmlFree link trouble on msys (Daniel Veillard), 1411 Allow to select the threading system on Windows (LRN), 1412 Fix Solaris binary links, cleanups (Daniel Veillard), 1413 Bug 571059 – MSVC doesn't work with the bakefile (Intron), 1414 fix ATTRIBUTE_PRINTF header clash (Belgabor and Mike Hommey), 1415 fixes for Borland/CodeGear/Embarcadero compilers (Eric Zurcher) 1416 </li> 1417 <li>Documentation: 1418 544910 typo: "renciliateNs" (Leonid Evdokimov), 1419 Add VxWorks to list of OSes (Daniel Veillard), 1420 Regenerate the documentation and update for git (Daniel Veillard), 1421 560524 ¿ xmlTextReaderLocalName description (Daniel Veillard), 1422 Added sponsoring by AOE media for the server (Daniel Veillard), 1423 updated URLs for GNOME (Vincent Lefevre), 1424 more warnings about xmlCleanupThreads and xmlCleanupParser (Daniel Veillard) 1425 </li> 1426 <li>Bug fixes: 1427 594514 memory leaks - duplicate initialization (MOD), 1428 Wrong block opening in htmlNodeDumpOutputInternal (Daniel Veillard), 1429 492317 Fix Relax-NG validation problems (Daniel Veillard), 1430 558452 fight with reg test and error report (Daniel Veillard), 1431 558452 RNG compilation of optional multiple child (Daniel Veillard), 1432 579746 XSD validation not correct / nilable groups (Daniel Veillard), 1433 502960 provide namespace stack when parsing entity (Daniel Veillard), 1434 566012 part 2 fix regresion tests and push mode (Daniel Veillard), 1435 566012 autodetected encoding and encoding conflict (Daniel Veillard), 1436 584220 xpointer(/) and xinclude problems (Daniel Veillard), 1437 587663 Incorrect Attribute-Value Normalization (Daniel Veillard), 1438 444994 HTML chunked failure for attribute with <> (Daniel Veillard), 1439 Fix end of buffer char being split in XML parser (Daniel Veillard), 1440 Non ASCII character may be split at buffer end (Adiel Mittmann), 1441 440226 Add xmlXIncludeProcessTreeFlagsData API (Stefan Behnel), 1442 572129 speed up parsing of large HTML text nodes (Markus Kull), 1443 Fix HTML parsing with 0 character in CDATA (Daniel Veillard), 1444 Fix SetGenericErrorFunc and SetStructured clash (Wang Lam), 1445 566012 Incomplete EBCDIC parsing support (Martin Kogler), 1446 541335 HTML avoid creating 2 head or 2 body element (Daniel Veillard), 1447 541237 error correcting missing end tags in HTML (Daniel Veillard), 1448 583439 missing line numbers in push mode (Daniel Veillard), 1449 587867 xmllint --html --xmlout serializing as HTML (Daniel Veillard), 1450 559501 avoid select and use poll for nanohttp (Raphael Prevost), 1451 559410 - Regexp bug on (...)? constructs (Daniel Veillard), 1452 Fix a small problem on previous HTML parser patch (Daniel Veillard), 1453 592430 - HTML parser runs into endless loop (Daniel Veillard), 1454 447899 potential double free in xmlFreeTextReader (Daniel Veillard), 1455 446613 small validation bug mixed content with NS (Daniel Veillard), 1456 Fix the problem of revalidating a doc with RNG (Daniel Veillard), 1457 Fix xmlKeepBlanksDefault to not break indent (Nick Wellnhofer), 1458 512131 refs from externalRef part need to be added (Daniel Veillard), 1459 512131 crash in xmlRelaxNGValidateFullElement (Daniel Veillard), 1460 588441 allow '.' in HTML Names even if invalid (Daniel Veillard), 1461 582913 Fix htmlSetMetaEncoding() to be nicer (Daniel Veillard), 1462 579317 Try to find the HTML encoding information (Daniel Veillard), 1463 575875 don't output charset=html (Daniel Veillard), 1464 571271 fix semantic of xsd:all with minOccurs=0 (Daniel Veillard), 1465 570702 fix a bug in regexp determinism checking (Daniel Veillard), 1466 567619 xmlValidateNotationUse missing param test (Daniel Veillard), 1467 574393 ¿ utf-8 filename magic for compressed files (Hans Breuer), 1468 Fix a couple of problems in the parser (Daniel Veillard), 1469 585505 ¿ Document ids and refs populated by XSD (Wayne Jensen), 1470 582906 XSD validating multiple imports of the same schema (Jason Childs), 1471 Bug 582887 ¿ problems validating complex schemas (Jason Childs), 1472 Bug 579729 ¿ fix XSD schemas parsing crash (Miroslav Bajtos), 1473 576368 ¿ htmlChunkParser with special attributes (Jiri Netolicky), 1474 Bug 565747 ¿ relax anyURI data character checking (Vincent Lefevre), 1475 Preserve attributes of include start on tree copy (Petr Pajas), 1476 Skip silently unrecognized XPointer schemes (Jakub Wilk), 1477 Fix leak on SAX1, xmllint --sax1 option and debug (Daniel Veillard), 1478 potential NULL dereference on non-glibc (Jim Meyering), 1479 Fix an XSD validation crash (Daniel Veillard), 1480 Fix a regression in streaming entities support (Daniel Veillard), 1481 Fix a couple of ABI issues with C14N 1.1 (Aleksey Sanin), 1482 Aleksey Sanin support for c14n 1.1 (Aleksey Sanin), 1483 reader bug fix with entities (Daniel Veillard), 1484 use options from current parser ctxt for external entities (Rob Richards), 1485 581612 use %s to printf strings (Christian Persch), 1486 584605 change the threading initialization sequence (Igor Novoseltsev), 1487 580705 keep line numbers in HTML parser (Aaron Patterson), 1488 581803 broken HTML table attributes init (Roland Steiner), 1489 do not set error code in xmlNsWarn (Rob Richards), 1490 564217 fix structured error handling problems, 1491 reuse options from current parser for entities (Rob Richards), 1492 xmlXPathRegisterNs should not allow enpty prefixes (Daniel Veillard), 1493 add a missing check in xmlAddSibling (Kris Breuker), 1494 avoid leaks on errors (Jinmei Tatuya) 1495 </li> 1496 <li>Cleanup: 1497 Chasing dead assignments reported by clang-scan (Daniel Veillard), 1498 A few more safety cleanup raised by scan (Daniel Veillard), 1499 Fixing assorted potential problems raised by scan (Daniel Veillard), 1500 Potential uninitialized arguments raised by scan (Daniel Veillard), 1501 Fix a bunch of scan 'dead increments' and cleanup (Daniel Veillard), 1502 Remove a pedantic warning (Daniel Veillard), 1503 555833 always use rm -f in uninstall-local (Daniel Veillard), 1504 542394 xmlRegisterOutputCallbacks MAX_INPUT_CALLBACK (Daniel Veillard), 1505 Autoregenerate libxml2.syms automated checkings (Daniel Veillard), 1506 Make xmlRecoverDoc const (Martin Trappel) (Daniel Veillard), 1507 Both args of xmlStrcasestr are const (Daniel Veillard), 1508 hide the nbParse* variables used for debugging (Mike Hommey), 1509 570806 changed include of config.h (William M. Brack), 1510 cleanups and error reports when xmlTextWriterVSprintf fails (Jinmei Tatuya) 1511 </li> 1512</ul> 1513<h3>2.7.3: Jan 18 2009</h3> 1514<ul> 1515 <li>Build fix: fix build when HTML support is not included.</li> 1516 <li>Bug fixes: avoid memory overflow in gigantic text nodes, 1517 indentation problem on the writed (Rob Richards), 1518 xmlAddChildList pointer problem (Rob Richards and Kevin Milburn), 1519 xmlAddChild problem with attribute (Rob Richards and Kris Breuker), 1520 avoid a memory leak in an edge case (Daniel Zimmermann), 1521 deallocate some pthread data (Alex Ott).</li> 1522 <li>Improvements: configure option to avoid rebuilding docs (Adrian Bunk), 1523 limit text nodes to 10MB max by default, add element traversal 1524 APIs, add a parser option to enable pre 2.7 SAX behavior (Rob Richards), 1525 add gcc malloc checking (Marcus Meissner), add gcc printf like functions 1526 parameters checking (Marcus Meissner).</li> 1527</ul> 1528<h3>2.7.2: Oct 3 2008</h3> 1529<ul> 1530 <li>Portability fix: fix solaris compilation problem, fix compilation 1531 if XPath is not configured in</li> 1532 <li>Bug fixes: nasty entity bug introduced in 2.7.0, restore old behaviour 1533 when saving an HTML doc with an xml dump function, HTML UTF-8 parsing 1534 bug, fix reader custom error handlers (Riccardo Scussat) 1535 <li>Improvement: xmlSave options for more flexibility to save as 1536 XML/HTML/XHTML, handle leading BOM in HTML documents</li> 1537</ul> 1538 1539<h3>2.7.1: Sep 1 2008</h3> 1540<ul> 1541 <li>Portability fix: Borland C fix (Moritz Both)</li> 1542 <li>Bug fixes: python serialization wrappers, XPath QName corner 1543 case handking and leaks (Martin)</li> 1544 <li>Improvement: extend the xmlSave to handle HTML documents and trees</li> 1545 <li>Cleanup: python serialization wrappers</li> 1546</ul> 1547 1548<h3>2.7.0: Aug 30 2008</h3> 1549<ul> 1550 <li>Documentation: switch ChangeLog to UTF-8, improve mutithreads and 1551 xmlParserCleanup docs</li> 1552 <li>Portability fixes: Older Win32 platforms (Rob Richards), MSVC 1553 porting fix (Rob Richards), Mac OS X regression tests (Sven Herzberg), 1554 non GNUCC builds (Rob Richards), compilation on Haiku (Andreas Färber) 1555 </li> 1556 <li>Bug fixes: various realloc problems (Ashwin), potential double-free 1557 (Ashwin), regexp crash, icrash with invalid whitespace facets (Rob 1558 Richards), pattern fix when streaming (William Brack), various XML 1559 parsing and validation fixes based on the W3C regression tests, reader 1560 tree skipping function fix (Ashwin), Schemas regexps escaping fix 1561 (Volker Grabsch), handling of entity push errors (Ashwin), fix a slowdown 1562 when encoder cant serialize characters on output</li> 1563 <li>Code cleanup: compilation fix without the reader, without the output 1564 (Robert Schwebel), python whitespace (Martin), many space/tabs cleanups, 1565 serious cleanup of the entity handling code</li> 1566 <li>Improvement: switch parser to XML-1.0 5th edition, add parsing flags 1567 for old versions, switch URI parsing to RFC 3986, 1568 add xmlSchemaValidCtxtGetParserCtxt (Holger Kaelberer), 1569 new hashing functions for dictionnaries (based on Stefan Behnel work), 1570 improve handling of misplaced html/head/body in HTML parser, better 1571 regression test tools and code coverage display, better algorithms 1572 to detect various versions of the billion laughts attacks, make 1573 arbitrary parser limits avoidable as a parser option</li> 1574</ul> 1575<h3>2.6.32: Apr 8 2008</h3> 1576<ul> 1577 <li>Documentation: returning heap memory to kernel (Wolfram Sang), 1578 trying to clarify xmlCleanupParser() use, xmlXPathContext improvement 1579 (Jack Jansen), improve the *Recover* functions documentation, 1580 XmlNodeType doc link fix (Martijn Arts)</li> 1581 <li>Bug fixes: internal subset memory leak (Ashwin), avoid problem with 1582 paths starting with // (Petr Sumbera), streaming XSD validation callback 1583 patches (Ashwin), fix redirection on port other than 80 (William Brack), 1584 SAX2 leak (Ashwin), XInclude fragment of own document (Chris Ryan), 1585 regexp bug with '.' (Andrew Tosh), flush the writer at the end of the 1586 document (Alfred Mickautsch), output I/O bug fix (William Brack), 1587 writer CDATA output after a text node (Alex Khesin), UTF-16 encoding 1588 detection (William Brack), fix handling of empty CDATA nodes for Safari 1589 team, python binding problem with namespace nodes, improve HTML parsing 1590 (Arnold Hendriks), regexp automata build bug, memory leak fix (Vasily 1591 Chekalkin), XSD test crash, weird system parameter entity parsing problem, 1592 allow save to file:///X:/ windows paths, various attribute normalisation 1593 problems, externalSubsetSplit fix (Ashwin), attribute redefinition in 1594 the DTD (Ashwin), fix in char ref parsing check (Alex Khesin), many 1595 out of memory handling fixes (Ashwin), XPath out of memory handling fixes 1596 (Alvaro Herrera), various realloc problems (Ashwin), UCS4 encoding 1597 conversion buffer size (Christian Fruth), problems with EatName 1598 functions on memory errors, BOM handling in external parsed entities 1599 (Mark Rowe)</li> 1600 <li>Code cleanup: fix build under VS 2008 (David Wimsey), remove useless 1601 mutex in xmlDict (Florent Guilian), Mingw32 compilation fix (Carlo 1602 Bramini), Win and MacOS EOL cleanups (Florent Guiliani), iconv need 1603 a const detection (Roumen Petrov), simplify xmlSetProp (Julien Charbon), 1604 cross compilation fixes for Mingw (Roumen Petrov), SCO Openserver build 1605 fix (Florent Guiliani), iconv uses const on Win32 (Rob Richards), 1606 duplicate code removal (Ashwin), missing malloc test and error reports 1607 (Ashwin), VMS makefile fix (Tycho Hilhorst)</li> 1608 <li>improvements: better plug of schematron in the normal error handling 1609 (Tobias Minich)</li> 1610</ul> 1611 1612<h3>2.6.31: Jan 11 2008</h3> 1613<ul> 1614 <li>Security fix: missing of checks in UTF-8 parsing</li> 1615 <li>Bug fixes: regexp bug, dump attribute from XHTML document, fix 1616 xmlFree(NULL) to not crash in debug mode, Schematron parsing crash 1617 (Rob Richards), global lock free on Windows (Marc-Antoine Ruel), 1618 XSD crash due to double free (Rob Richards), indentation fix in 1619 xmlTextWriterFullEndElement (Felipe Pena), error in attribute type 1620 parsing if attribute redeclared, avoid crash in hash list scanner if 1621 deleting elements, column counter bug fix (Christian Schmidt), 1622 HTML embed element saving fix (Stefan Behnel), avoid -L/usr/lib 1623 output from xml2-config (Fred Crozat), avoid an xmllint crash 1624 (Stefan Kost), don't stop HTML parsing on out of range chars. 1625 </li> 1626 <li>Code cleanup: fix open() call third argument, regexp cut'n paste 1627 copy error, unused variable in __xmlGlobalInitMutexLock (Hannes Eder), 1628 some make distcheck realted fixes (John Carr)</li> 1629 <li>Improvements: HTTP Header: includes port number (William Brack), 1630 testURI --debug option, </li> 1631</ul> 1632<h3>2.6.30: Aug 23 2007</h3> 1633<ul> 1634 <li>Portability: Solaris crash on error handling, windows path fixes 1635 (Roland Schwarz and Rob Richards), mingw build (Roland Schwarz)</li> 1636 <li>Bugfixes: xmlXPathNodeSetSort problem (William Brack), leak when 1637 reusing a writer for a new document (Dodji Seketeli), Schemas 1638 xsi:nil handling patch (Frank Gross), relative URI build problem 1639 (Patrik Fimml), crash in xmlDocFormatDump, invalid char in comment 1640 detection bug, fix disparity with xmlSAXUserParseMemory, automata 1641 generation for complex regexp counts problems, Schemas IDC import 1642 problems (Frank Gross), xpath predicate evailation error handling 1643 (William Brack)</li> 1644</ul> 1645<h3>2.6.29: Jun 12 2007</h3> 1646<ul> 1647 <li>Portability: patches from Andreas Stricke for WinCEi, 1648 fix compilation warnings (William Brack), avoid warnings on Apple OS/X 1649 (Wendy Doyle and Mark Rowe), Windows compilation and threading 1650 improvements (Rob Richards), compilation against old Python versions, 1651 new GNU tar changes (Ryan Hill)</li> 1652 <li>Documentation: xmlURIUnescapeString comment, </li> 1653 <li>Bugfixes: xmlBufferAdd problem (Richard Jones), 'make valgrind' 1654 flag fix (Richard Jones), regexp interpretation of \, 1655 htmlCreateDocParserCtxt (Jean-Daniel Dupas), configure.in 1656 typo (Bjorn Reese), entity content failure, xmlListAppend() fix 1657 (Georges-André Silber), XPath number serialization (William Brack), 1658 nanohttp gzipped stream fix (William Brack and Alex Cornejo), 1659 xmlCharEncFirstLine typo (Mark Rowe), uri bug (François Delyon), 1660 XPath string value of PI nodes (William Brack), XPath node set 1661 sorting bugs (William Brack), avoid outputting namespace decl 1662 dups in the writer (Rob Richards), xmlCtxtReset bug, UTF-8 encoding 1663 error handling, recustion on next in catalogs, fix a Relax-NG crash, 1664 workaround wrong file: URIs, htmlNodeDumpFormatOutput on attributes, 1665 invalid character in attribute detection bug, big comments before 1666 internal subset streaming bug, HTML parsing of attributes with : in 1667 the name, IDness of name in HTML (Dagfinn I. MannsÃ¥ker) </li> 1668 <li>Improvement: keep URI query parts in raw form (Richard Jones), 1669 embed tag support in HTML (Michael Day) </li> 1670</ul> 1671 1672<h3>2.6.28: Apr 17 2007</h3> 1673<ul> 1674 <li>Documentation: comment fixes (Markus Keim), xpath comments fixes too 1675 (James Dennett)</li> 1676 <li>Bug fixes: XPath bug (William Brack), HTML parser autoclose stack usage 1677 (Usamah Malik), various regexp bug fixes (DV and William), path conversion 1678 on Windows (Igor Zlatkovic), htmlCtxtReset fix (Michael Day), XPath 1679 principal node of axis bug, HTML serialization of some codepoint 1680 (Steven Rainwater), user data propagation in XInclude (Michael Day), 1681 standalone and XML decl detection (Michael Day), Python id ouptut 1682 for some id, fix the big python string memory leak, URI parsing fixes 1683 (Stéphane Bidoul and William), long comments parsing bug (William), 1684 concurrent threads initialization (Ted Phelps), invalid char 1685 in text XInclude (William), XPath memory leak (William), tab in 1686 python problems (Andreas Hanke), XPath node comparison error 1687 (Oleg Paraschenko), cleanup patch for reader (Julien Reichel), 1688 XML Schemas attribute group (William), HTML parsing problem (William), 1689 fix char 0x2d in regexps (William), regexp quantifier range with 1690 min occurs of 0 (William), HTML script/style parsing (Mike Day)</li> 1691 <li>Improvement: make xmlTextReaderSetup() public</li> 1692 <li>Compilation and postability: fix a missing include problem (William), 1693 __ss_familly on AIX again (Björn Wiberg), compilation without zlib 1694 (Michael Day), catalog patch for Win32 (Christian Ehrlicher), 1695 Windows CE fixes (Andreas Stricke)</li> 1696 <li>Various CVS to SVN infrastructure changes</li> 1697</ul> 1698<h3>2.6.27: Oct 25 2006</h3> 1699<ul> 1700 <li>Portability fixes: file names on windows (Roland Schwingel, 1701 Emelyanov Alexey), windows compile fixup (Rob Richards), 1702 AIX iconv() is apparently case sensitive</li> 1703 <li>improvements: Python XPath types mapping (Nic Ferrier), XPath optimization 1704 (Kasimier), add xmlXPathCompiledEvalToBoolean (Kasimier), Python node 1705 equality and comparison (Andreas Pakulat), xmlXPathCollectAndTest 1706 improvememt (Kasimier), expose if library was compiled with zlib 1707 support (Andrew Nosenko), cache for xmlSchemaIDCMatcher structs 1708 (Kasimier), xmlTextConcat should work with comments and PIs (Rob 1709 Richards), export htmlNewParserCtxt needed by Michael Day, refactoring 1710 of catalog entity loaders (Michael Day), add XPointer support to 1711 python bindings (Ross Reedstrom, Brian West and Stefan Anca), 1712 try to sort out most file path to URI conversions and xmlPathToUri, 1713 add --html --memory case to xmllint</li> 1714 <li>building fix: fix --with-minimum (Felipe Contreras), VMS fix, 1715 const'ification of HTML parser structures (Matthias Clasen), 1716 portability fix (Emelyanov Alexey), wget autodetection (Peter 1717 Breitenlohner), remove the build path recorded in the python 1718 shared module, separate library flags for shared and static builds 1719 (Mikhail Zabaluev), fix --with-minimum --with-sax1 builds, fix 1720 --with-minimum --with-schemas builds</li> 1721 <li>bug fix: xmlGetNodePath fix (Kasimier), xmlDOMWrapAdoptNode and 1722 attribute (Kasimier), crash when using the recover mode, 1723 xmlXPathEvalExpr problem (Kasimier), xmlXPathCompExprAdd bug (Kasimier), 1724 missing destry in xmlFreeRMutex (Andrew Nosenko), XML Schemas fixes 1725 (Kasimier), warning on entities processing, XHTML script and style 1726 serialization (Kasimier), python generator for long types, bug in 1727 xmlSchemaClearValidCtxt (Bertrand Fritsch), xmlSchemaXPathEvaluate 1728 allocation bug (Marton Illes), error message end of line (Rob Richards), 1729 fix attribute serialization in writer (Rob Richards), PHP4 DTD validation 1730 crasher, parser safety patch (Ben Darnell), _private context propagation 1731 when parsing entities (with Michael Day), fix entities behaviour when 1732 using SAX, URI to file path fix (Mikhail Zabaluev), disapearing validity 1733 context, arg error in SAX callback (Mike Hommey), fix mixed-content 1734 autodetect when using --noblanks, fix xmlIOParseDTD error handling, 1735 fix bug in xmlSplitQName on special Names, fix Relax-NG element content 1736 validation bug, fix xmlReconciliateNs bug, fix potential attribute 1737 XML parsing bug, fix line/column accounting in XML parser, chunking bug 1738 in the HTML parser on script, try to detect obviously buggy HTML 1739 meta encoding indications, bugs with encoding BOM and xmlSaveDoc, 1740 HTML entities in attributes parsing, HTML minimized attribute values, 1741 htmlReadDoc and htmlReadIO were broken, error handling bug in 1742 xmlXPathEvalExpression (Olaf Walkowiak), fix a problem in 1743 htmlCtxtUseOptions, xmlNewInputFromFile could leak (Marius Konitzer), 1744 bug on misformed SSD regexps (Christopher Boumenot) 1745 </li> 1746 <li>documentation: warning about XML_PARSE_COMPACT (Kasimier Buchcik), 1747 fix xmlXPathCastToString documentation, improve man pages for 1748 xmllitn and xmlcatalog (Daniel Leidert), fixed comments of a few 1749 functions</li> 1750</ul> 1751<h3>2.6.26: Jun 6 2006</h3> 1752<ul> 1753 <li>portability fixes: Python detection (Joseph Sacco), compilation 1754 error(William Brack and Graham Bennett), LynxOS patch (Olli Savia)</li> 1755 <li>bug fixes: encoding buffer problem, mix of code and data in 1756 xmlIO.c(Kjartan Maraas), entities in XSD validation (Kasimier Buchcik), 1757 variousXSD validation fixes (Kasimier), memory leak in pattern (Rob 1758 Richards andKasimier), attribute with colon in name (Rob Richards), XPath 1759 leak inerror reporting (Aleksey Sanin), XInclude text include of 1760 selfdocument.</li> 1761 <li>improvements: Xpath optimizations (Kasimier), XPath object 1762 cache(Kasimier)</li> 1763</ul> 1764 1765<h3>2.6.25: Jun 6 2006:</h3> 1766 1767<p>Do not use or package 2.6.25</p> 1768 1769<h3>2.6.24: Apr 28 2006</h3> 1770<ul> 1771 <li>Portability fixes: configure on Windows, testapi compile on windows 1772 (Kasimier Buchcik, venkat naidu), Borland C++ 6 compile (Eric Zurcher), 1773 HP-UX compiler workaround (Rick Jones), xml2-config bugfix, gcc-4.1 1774 cleanups, Python detection scheme (Joseph Sacco), UTF-8 file paths on 1775 Windows (Roland Schwingel). 1776 </li> 1777 <li>Improvements: xmlDOMWrapReconcileNamespaces xmlDOMWrapCloneNode (Kasimier 1778 Buchcik), XML catalog debugging (Rick Jones), update to Unicode 4.01.</li> 1779 <li>Bug fixes: xmlParseChunk() problem in 2.6.23, xmlParseInNodeContext() 1780 on HTML docs, URI behaviour on Windows (Rob Richards), comment streaming 1781 bug, xmlParseComment (with William Brack), regexp bug fixes (DV & 1782 Youri Golovanov), xmlGetNodePath on text/CDATA (Kasimier), 1783 one Relax-NG interleave bug, xmllint --path and --valid, 1784 XSD bugfixes (Kasimier), remove debug 1785 left in Python bindings (Nic Ferrier), xmlCatalogAdd bug (Martin Cole), 1786 xmlSetProp fixes (Rob Richards), HTML IDness (Rob Richards), a large 1787 number of cleanups and small fixes based on Coverity reports, bug 1788 in character ranges, Unicode tables const (Aivars Kalvans), schemas 1789 fix (Stefan Kost), xmlRelaxNGParse error deallocation, 1790 xmlSchemaAddSchemaDoc error deallocation, error handling on unallowed 1791 code point, ixmllint --nonet to never reach the net (Gary Coady), 1792 line break in writer after end PI (Jason Viers). </li> 1793 <li>Documentation: man pages updates and cleanups (Daniel Leidert).</li> 1794 <li>New features: Relax NG structure error handlers.</li> 1795</ul> 1796 1797<h3>2.6.23: Jan 5 2006</h3> 1798<ul> 1799 <li>portability fixes: Windows (Rob Richards), getaddrinfo on Windows 1800 (Kolja Nowak, Rob Richards), icc warnings (Kjartan Maraas), 1801 --with-minimum compilation fixes (William Brack), error case handling fix 1802 on Solaris (Albert Chin), don't use 'list' as parameter name reported by 1803 Samuel Diaz Garcia, more old Unices portability fixes (Albert Chin), 1804 MinGW compilation (Mark Junker), HP-UX compiler warnings (Rick 1805 Jones),</li> 1806 <li>code cleanup: xmlReportError (Adrian Mouat), remove xmlBufferClose 1807 (Geert Jansen), unreachable code (Oleksandr Kononenko), refactoring 1808 parsing code (Bjorn Reese)</li> 1809 <li>bug fixes: xmlBuildRelativeURI and empty path (William Brack), 1810 combinatory explosion and performances in regexp code, leak in 1811 xmlTextReaderReadString(), xmlStringLenDecodeEntities problem (Massimo 1812 Morara), Identity Constraints bugs and a segfault (Kasimier Buchcik), 1813 XPath pattern based evaluation bugs (DV & Kasimier), 1814 xmlSchemaContentModelDump() memory leak (Kasimier), potential leak in 1815 xmlSchemaCheckCSelectorXPath(), xmlTextWriterVSprintf() misuse of 1816 vsnprintf (William Brack), XHTML serialization fix (Rob Richards), CRLF 1817 split problem (William), issues with non-namespaced attributes in 1818 xmlAddChild() xmlAddNextSibling() and xmlAddPrevSibling() (Rob Richards), 1819 HTML parsing of script, Python must not output to stdout (Nic Ferrier), 1820 exclusive C14N namespace visibility (Aleksey Sanin), XSD dataype 1821 totalDigits bug (Kasimier Buchcik), error handling when writing to an 1822 xmlBuffer (Rob Richards), runtest schemas error not reported (Hisashi 1823 Fujinaka), signed/unsigned problem in date/time code (Albert Chin), fix 1824 XSI driven XSD validation (Kasimier), parsing of xs:decimal (Kasimier), 1825 fix DTD writer output (Rob Richards), leak in xmlTextReaderReadInnerXml 1826 (Gary Coady), regexp bug affecting schemas (Kasimier), configuration of 1827 runtime debugging (Kasimier), xmlNodeBufGetContent bug on entity refs 1828 (Oleksandr Kononenko), xmlRegExecPushString2 bug (Sreeni Nair), 1829 compilation and build fixes (Michael Day), removed dependancies on 1830 xmlSchemaValidError (Kasimier), bug with <xml:foo/>, more XPath 1831 pattern based evaluation fixes (Kasimier)</li> 1832 <li>improvements: XSD Schemas redefinitions/restrictions (Kasimier 1833 Buchcik), node copy checks and fix for attribute (Rob Richards), counted 1834 transition bug in regexps, ctxt->standalone = -2 to indicate no 1835 standalone attribute was found, add xmlSchemaSetParserStructuredErrors() 1836 (Kasimier Buchcik), add xmlTextReaderSchemaValidateCtxt() to API 1837 (Kasimier), handle gzipped HTTP resources (Gary Coady), add 1838 htmlDocDumpMemoryFormat. (Rob Richards),</li> 1839 <li>documentation: typo (Michael Day), libxml man page (Albert Chin), save 1840 function to XML buffer (Geert Jansen), small doc fix (Aron Stansvik),</li> 1841</ul> 1842 1843<h3>2.6.22: Sep 12 2005</h3> 1844<ul> 1845 <li>build fixes: compile without schematron (Stéphane Bidoul)</li> 1846 <li>bug fixes: xmlDebugDumpNode on namespace node (Oleg Paraschenko)i, 1847 CDATA push parser bug, xmlElemDump problem with XHTML1 doc, 1848 XML_FEATURE_xxx clash with expat headers renamed XML_WITH_xxx, fix some 1849 output formatting for meta element (Rob Richards), script and style 1850 XHTML1 serialization (David Madore), Attribute derivation fixups in XSD 1851 (Kasimier Buchcik), better IDC error reports (Kasimier Buchcik)</li> 1852 <li>improvements: add XML_SAVE_NO_EMPTY xmlSaveOption (Rob Richards), add 1853 XML_SAVE_NO_XHTML xmlSaveOption, XML Schemas improvements preparing for 1854 derive (Kasimier Buchcik).</li> 1855 <li>documentation: generation of gtk-doc like docs, integration with 1856 devhelp.</li> 1857</ul> 1858 1859<h3>2.6.21: Sep 4 2005</h3> 1860<ul> 1861 <li>build fixes: Cygwin portability fixes (Gerrit P. Haase), calling 1862 convention problems on Windows (Marcus Boerger), cleanups based on Linus' 1863 sparse tool, update of win32/configure.js (Rob Richards), remove warnings 1864 on Windows(Marcus Boerger), compilation without SAX1, detection of the 1865 Python binary, use $GCC inestad of $CC = 'gcc' (Andrew W. Nosenko), 1866 compilation/link with threads and old gcc, compile problem by C370 on 1867 Z/OS,</li> 1868 <li>bug fixes: http_proxy environments (Peter Breitenlohner), HTML UTF-8 1869 bug (Jiri Netolicky), XPath NaN compare bug (William Brack), 1870 htmlParseScript potential bug, Schemas regexp handling of spaces, Base64 1871 Schemas comparisons NIST passes, automata build error xsd:all, 1872 xmlGetNodePath for namespaced attributes (Alexander Pohoyda), xmlSchemas 1873 foreign namespaces handling, XML Schemas facet comparison (Kupriyanov 1874 Anatolij), xmlSchemaPSimpleTypeErr error report (Kasimier Buchcik), xml: 1875 namespace ahndling in Schemas (Kasimier), empty model group in Schemas 1876 (Kasimier), wilcard in Schemas (Kasimier), URI composition (William), 1877 xs:anyType in Schemas (Kasimier), Python resolver emmitting error 1878 messages directly, Python xmlAttr.parent (Jakub Piotr Clapa), trying to 1879 fix the file path/URI conversion, xmlTextReaderGetAttribute fix (Rob 1880 Richards), xmlSchemaFreeAnnot memleak (Kasimier), HTML UTF-8 1881 serialization, streaming XPath, Schemas determinism detection problem, 1882 XInclude bug, Schemas context type (Dean Hill), validation fix (Derek 1883 Poon), xmlTextReaderGetAttribute[Ns] namespaces (Rob Richards), Schemas 1884 type fix (Kuba Nowakowski), UTF-8 parser bug, error in encoding handling, 1885 xmlGetLineNo fixes, bug on entities handling, entity name extraction in 1886 error handling with XInclude, text nodes in HTML body tags (Gary Coady), 1887 xml:id and IDness at the treee level fixes, XPath streaming patterns 1888 bugs.</li> 1889 <li>improvements: structured interfaces for schemas and RNG error reports 1890 (Marcus Boerger), optimization of the char data inner loop parsing 1891 (thanks to Behdad Esfahbod for the idea), schematron validation though 1892 not finished yet, xmlSaveOption to omit XML declaration, keyref match 1893 error reports (Kasimier), formal expression handling code not plugged 1894 yet, more lax mode for the HTML parser, parser XML_PARSE_COMPACT option 1895 for text nodes allocation.</li> 1896 <li>documentation: xmllint man page had --nonet duplicated</li> 1897</ul> 1898 1899<h3>2.6.20: Jul 10 2005</h3> 1900<ul> 1901 <li>build fixes: Windows build (Rob Richards), Mingw compilation (Igor 1902 Zlatkovic), Windows Makefile (Igor), gcc warnings (Kasimier and 1903 andriy@google.com), use gcc weak references to pthread to avoid the 1904 pthread dependancy on Linux, compilation problem (Steve Nairn), compiling 1905 of subset (Morten Welinder), IPv6/ss_family compilation (William Brack), 1906 compilation when disabling parts of the library, standalone test 1907 distribution.</li> 1908 <li>bug fixes: bug in lang(), memory cleanup on errors (William Brack), 1909 HTTP query strings (Aron Stansvik), memory leak in DTD (William), integer 1910 overflow in XPath (William), nanoftp buffer size, pattern "." apth fixup 1911 (Kasimier), leak in tree reported by Malcolm Rowe, replaceNode patch 1912 (Brent Hendricks), CDATA with NULL content (Mark Vakoc), xml:base fixup 1913 on XInclude (William), pattern fixes (William), attribute bug in 1914 exclusive c14n (Aleksey Sanin), xml:space and xml:lang with SAX2 (Rob 1915 Richards), namespace trouble in complex parsing (Malcolm Rowe), XSD type 1916 QNames fixes (Kasimier), XPath streaming fixups (William), RelaxNG bug 1917 (Rob Richards), Schemas for Schemas fixes (Kasimier), removal of ID (Rob 1918 Richards), a small RelaxNG leak, HTML parsing in push mode bug (James 1919 Bursa), failure to detect UTF-8 parsing bugs in CDATA sections, 1920 areBlanks() heuristic failure, duplicate attributes in DTD bug 1921 (William).</li> 1922 <li>improvements: lot of work on Schemas by Kasimier Buchcik both on 1923 conformance and streaming, Schemas validation messages (Kasimier Buchcik, 1924 Matthew Burgess), namespace removal at the python level (Brent 1925 Hendricks), Update to new Schemas regression tests from W3C/Nist 1926 (Kasimier), xmlSchemaValidateFile() (Kasimier), implementation of 1927 xmlTextReaderReadInnerXml and xmlTextReaderReadOuterXml (James Wert), 1928 standalone test framework and programs, new DOM import APIs 1929 xmlDOMWrapReconcileNamespaces() xmlDOMWrapAdoptNode() and 1930 xmlDOMWrapRemoveNode(), extension of xmllint capabilities for SAX and 1931 Schemas regression tests, xmlStopParser() available in pull mode too, 1932 ienhancement to xmllint --shell namespaces support, Windows port of the 1933 standalone testing tools (Kasimier and William), 1934 xmlSchemaValidateStream() xmlSchemaSAXPlug() and xmlSchemaSAXUnplug() SAX 1935 Schemas APIs, Schemas xmlReader support.</li> 1936</ul> 1937 1938<h3>2.6.19: Apr 02 2005</h3> 1939<ul> 1940 <li>build fixes: drop .la from RPMs, --with-minimum build fix (William 1941 Brack), use XML_SOCKLEN_T instead of SOCKLEN_T because it breaks with AIX 1942 5.3 compiler, fixed elfgcchack.h generation and PLT reduction code on 1943 Linux/ELF/gcc4</li> 1944 <li>bug fixes: schemas type decimal fixups (William Brack), xmmlint return 1945 code (Gerry Murphy), small schemas fixes (Matthew Burgess and GUY 1946 Fabrice), workaround "DAV:" namespace brokeness in c14n (Aleksey Sanin), 1947 segfault in Schemas (Kasimier Buchcik), Schemas attribute validation 1948 (Kasimier), Prop related functions and xmlNewNodeEatName (Rob Richards), 1949 HTML serialization of name attribute on a elements, Python error handlers 1950 leaks and improvement (Brent Hendricks), uninitialized variable in 1951 encoding code, Relax-NG validation bug, potential crash if 1952 gnorableWhitespace is NULL, xmlSAXParseDoc and xmlParseDoc signatures, 1953 switched back to assuming UTF-8 in case no encoding is given at 1954 serialization time</li> 1955 <li>improvements: lot of work on Schemas by Kasimier Buchcik on facets 1956 checking and also mixed handling.</li> 1957 <li></li> 1958</ul> 1959 1960<h3>2.6.18: Mar 13 2005</h3> 1961<ul> 1962 <li>build fixes: warnings (Peter Breitenlohner), testapi.c generation, 1963 Bakefile support (Francesco Montorsi), Windows compilation (Joel Reed), 1964 some gcc4 fixes, HP-UX portability fixes (Rick Jones).</li> 1965 <li>bug fixes: xmlSchemaElementDump namespace (Kasimier Buchcik), push and 1966 xmlreader stopping on non-fatal errors, thread support for dictionnaries 1967 reference counting (Gary Coady), internal subset and push problem, URL 1968 saved in xmlCopyDoc, various schemas bug fixes (Kasimier), Python paths 1969 fixup (Stephane Bidoul), xmlGetNodePath and namespaces, xmlSetNsProp fix 1970 (Mike Hommey), warning should not count as error (William Brack), 1971 xmlCreatePushParser empty chunk, XInclude parser flags (William), cleanup 1972 FTP and HTTP code to reuse the uri parsing and IPv6 (William), 1973 xmlTextWriterStartAttributeNS fix (Rob Richards), XMLLINT_INDENT being 1974 empty (William), xmlWriter bugs (Rob Richards), multithreading on Windows 1975 (Rich Salz), xmlSearchNsByHref fix (Kasimier), Python binding leak (Brent 1976 Hendricks), aliasing bug exposed by gcc4 on s390, xmlTextReaderNext bug 1977 (Rob Richards), Schemas decimal type fixes (William Brack), 1978 xmlByteConsumed static buffer (Ben Maurer).</li> 1979 <li>improvement: speedup parsing comments and DTDs, dictionnary support for 1980 hash tables, Schemas Identity constraints (Kasimier), streaming XPath 1981 subset, xmlTextReaderReadString added (Bjorn Reese), Schemas canonical 1982 values handling (Kasimier), add xmlTextReaderByteConsumed (Aron 1983 Stansvik),</li> 1984 <li>Documentation: Wiki support (Joel Reed)</li> 1985</ul> 1986 1987<h3>2.6.17: Jan 16 2005</h3> 1988<ul> 1989 <li>build fixes: Windows, warnings removal (William Brack), 1990 maintainer-clean dependency(William), build in a different directory 1991 (William), fixing --with-minimum configure build (William), BeOS build 1992 (Marcin Konicki), Python-2.4 detection (William), compilation on AIX (Dan 1993 McNichol)</li> 1994 <li>bug fixes: xmlTextReaderHasAttributes (Rob Richards), xmlCtxtReadFile() 1995 to use the catalog(s), loop on output (William Brack), XPath memory leak, 1996 ID deallocation problem (Steve Shepard), debugDumpNode crash (William), 1997 warning not using error callback (William), xmlStopParser bug (William), 1998 UTF-16 with BOM on DTDs (William), namespace bug on empty elements in 1999 push mode (Rob Richards), line and col computations fixups (Aleksey 2000 Sanin), xmlURIEscape fix (William), xmlXPathErr on bad range (William), 2001 patterns with too many steps, bug in RNG choice optimization, line number 2002 sometimes missing.</li> 2003 <li>improvements: XSD Schemas (Kasimier Buchcik), python generator 2004 (William), xmlUTF8Strpos speedup (William), unicode Python strings 2005 (William), XSD error reports (Kasimier Buchcik), Python __str__ call 2006 serialize().</li> 2007 <li>new APIs: added xmlDictExists(), GetLineNumber and GetColumnNumber for 2008 the xmlReader (Aleksey Sanin), Dynamic Shared Libraries APIs (mostly Joel 2009 Reed), error extraction API from regexps, new XMLSave option for format 2010 (Phil Shafer)</li> 2011 <li>documentation: site improvement (John Fleck), FAQ entries 2012 (William).</li> 2013</ul> 2014 2015<h3>2.6.16: Nov 10 2004</h3> 2016<ul> 2017 <li>general hardening and bug fixing crossing all the API based on new 2018 automated regression testing</li> 2019 <li>build fix: IPv6 build and test on AIX (Dodji Seketeli)</li> 2020 <li>bug fixes: problem with XML::Libxml reported by Petr Pajas, encoding 2021 conversion functions return values, UTF-8 bug affecting XPath reported by 2022 Markus Bertheau, catalog problem with NULL entries (William Brack)</li> 2023 <li>documentation: fix to xmllint man page, some API function descritpion 2024 were updated.</li> 2025 <li>improvements: DTD validation APIs provided at the Python level (Brent 2026 Hendricks)</li> 2027</ul> 2028 2029<h3>2.6.15: Oct 27 2004</h3> 2030<ul> 2031 <li>security fixes on the nanoftp and nanohttp modules</li> 2032 <li>build fixes: xmllint detection bug in configure, building outside the 2033 source tree (Thomas Fitzsimmons)</li> 2034 <li>bug fixes: HTML parser on broken ASCII chars in names (William), Python 2035 paths (Malcolm Tredinnick), xmlHasNsProp and default namespace (William), 2036 saving to python file objects (Malcolm Tredinnick), DTD lookup fix 2037 (Malcolm), save back <group> in catalogs (William), tree build 2038 fixes (DV and Rob Richards), Schemas memory bug, structured error handler 2039 on Python 64bits, thread local memory deallocation, memory leak reported 2040 by Volker Roth, xmlValidateDtd in the presence of an internal subset, 2041 entities and _private problem (William), xmlBuildRelativeURI error 2042 (William).</li> 2043 <li>improvements: better XInclude error reports (William), tree debugging 2044 module and tests, convenience functions at the Reader API (Graham 2045 Bennett), add support for PI in the HTML parser.</li> 2046</ul> 2047 2048<h3>2.6.14: Sep 29 2004</h3> 2049<ul> 2050 <li>build fixes: configure paths for xmllint and xsltproc, compilation 2051 without HTML parser, compilation warning cleanups (William Brack & 2052 Malcolm Tredinnick), VMS makefile update (Craig Berry),</li> 2053 <li>bug fixes: xmlGetUTF8Char (William Brack), QName properties (Kasimier 2054 Buchcik), XInclude testing, Notation serialization, UTF8ToISO8859x 2055 transcoding (Mark Itzcovitz), lots of XML Schemas cleanup and fixes 2056 (Kasimier), ChangeLog cleanup (Stepan Kasal), memory fixes (Mark Vakoc), 2057 handling of failed realloc(), out of bound array adressing in Schemas 2058 date handling, Python space/tabs cleanups (Malcolm Tredinnick), NMTOKENS 2059 E20 validation fix (Malcolm),</li> 2060 <li>improvements: added W3C XML Schemas testsuite (Kasimier Buchcik), add 2061 xmlSchemaValidateOneElement (Kasimier), Python exception hierearchy 2062 (Malcolm Tredinnick), Python libxml2 driver improvement (Malcolm 2063 Tredinnick), Schemas support for xsi:schemaLocation, 2064 xsi:noNamespaceSchemaLocation, xsi:type (Kasimier Buchcik)</li> 2065</ul> 2066 2067<h3>2.6.13: Aug 31 2004</h3> 2068<ul> 2069 <li>build fixes: Windows and zlib (Igor Zlatkovic), -O flag with gcc, 2070 Solaris compiler warning, fixing RPM BuildRequires,</li> 2071 <li>fixes: DTD loading on Windows (Igor), Schemas error reports APIs 2072 (Kasimier Buchcik), Schemas validation crash, xmlCheckUTF8 (William Brack 2073 and Julius Mittenzwei), Schemas facet check (Kasimier), default namespace 2074 problem (William), Schemas hexbinary empty values, encoding error could 2075 genrate a serialization loop.</li> 2076 <li>Improvements: Schemas validity improvements (Kasimier), added --path 2077 and --load-trace options to xmllint</li> 2078 <li>documentation: tutorial update (John Fleck)</li> 2079</ul> 2080 2081<h3>2.6.12: Aug 22 2004</h3> 2082<ul> 2083 <li>build fixes: fix --with-minimum, elfgcchack.h fixes (Peter 2084 Breitenlohner), perl path lookup (William), diff on Solaris (Albert 2085 Chin), some 64bits cleanups.</li> 2086 <li>Python: avoid a warning with 2.3 (William Brack), tab and space mixes 2087 (William), wrapper generator fixes (William), Cygwin support (Gerrit P. 2088 Haase), node wrapper fix (Marc-Antoine Parent), XML Schemas support 2089 (Torkel Lyng)</li> 2090 <li>Schemas: a lot of bug fixes and improvements from Kasimier Buchcik</li> 2091 <li>fixes: RVT fixes (William), XPath context resets bug (William), memory 2092 debug (Steve Hay), catalog white space handling (Peter Breitenlohner), 2093 xmlReader state after attribute reading (William), structured error 2094 handler (William), XInclude generated xml:base fixup (William), Windows 2095 memory reallocation problem (Steve Hay), Out of Memory conditions 2096 handling (William and Olivier Andrieu), htmlNewDoc() charset bug, 2097 htmlReadMemory init (William), a posteriori validation DTD base 2098 (William), notations serialization missing, xmlGetNodePath (Dodji), 2099 xmlCheckUTF8 (Diego Tartara), missing line numbers on entity 2100 (William)</li> 2101 <li>improvements: DocBook catalog build scrip (William), xmlcatalog tool 2102 (Albert Chin), xmllint --c14n option, no_proxy environment (Mike Hommey), 2103 xmlParseInNodeContext() addition, extend xmllint --shell, allow XInclude 2104 to not generate start/end nodes, extend xmllint --version to include CVS 2105 tag (William)</li> 2106 <li>documentation: web pages fixes, validity API docs fixes (William) 2107 schemas API fix (Eric Haszlakiewicz), xmllint man page (John Fleck)</li> 2108</ul> 2109 2110<h3>2.6.11: July 5 2004</h3> 2111<ul> 2112 <li>Schemas: a lot of changes and improvements by Kasimier Buchcik for 2113 attributes, namespaces and simple types.</li> 2114 <li>build fixes: --with-minimum (William Brack), some gcc cleanup 2115 (William), --with-thread-alloc (William)</li> 2116 <li>portability: Windows binary package change (Igor Zlatkovic), Catalog 2117 path on Windows</li> 2118 <li>documentation: update to the tutorial (John Fleck), xmllint return code 2119 (John Fleck), man pages (Ville Skytta),</li> 2120 <li>bug fixes: C14N bug serializing namespaces (Aleksey Sanin), testSAX 2121 properly initialize the library (William), empty node set in XPath 2122 (William), xmlSchemas errors (William), invalid charref problem pointed 2123 by Morus Walter, XInclude xml:base generation (William), Relax-NG bug 2124 with div processing (William), XPointer and xml:base problem(William), 2125 Reader and entities, xmllint return code for schemas (William), reader 2126 streaming problem (Steve Ball), DTD serialization problem (William), 2127 libxml.m4 fixes (Mike Hommey), do not provide destructors as methods on 2128 Python classes, xmlReader buffer bug, Python bindings memory interfaces 2129 improvement (with Stéphane Bidoul), Fixed the push parser to be back to 2130 synchronous behaviour.</li> 2131 <li>improvement: custom per-thread I/O enhancement (Rob Richards), register 2132 namespace in debug shell (Stefano Debenedetti), Python based regression 2133 test for non-Unix users (William), dynamically increase the number of 2134 XPath extension functions in Python and fix a memory leak (Marc-Antoine 2135 Parent and William)</li> 2136 <li>performance: hack done with Arjan van de Ven to reduce ELF footprint 2137 and generated code on Linux, plus use gcc runtime profiling to optimize 2138 the code generated in the RPM packages.</li> 2139</ul> 2140 2141<h3>2.6.10: May 17 2004</h3> 2142<ul> 2143 <li>Web page generated for ChangeLog</li> 2144 <li>build fixes: --without-html problems, make check without make all</li> 2145 <li>portability: problem with xpath.c on Windows (MSC and Borland), memcmp 2146 vs. strncmp on Solaris, XPath tests on Windows (Mark Vakoc), C++ do not 2147 use "list" as parameter name, make tests work with Python 1.5 (Ed 2148 Davis),</li> 2149 <li>improvements: made xmlTextReaderMode public, small buffers resizing 2150 (Morten Welinder), add --maxmem option to xmllint, add 2151 xmlPopInputCallback() for Matt Sergeant, refactoring of serialization 2152 escaping, added escaping customization</li> 2153 <li>bugfixes: xsd:extension (Taihei Goi), assorted regexp bugs (William 2154 Brack), xmlReader end of stream problem, node deregistration with reader, 2155 URI escaping and filemanes, XHTML1 formatting (Nick Wellnhofer), regexp 2156 transition reduction (William), various XSD Schemas fixes (Kasimier 2157 Buchcik), XInclude fallback problem (William), weird problems with DTD 2158 (William), structured error handler callback context (William), reverse 2159 xmlEncodeSpecialChars() behaviour back to escaping '"'</li> 2160</ul> 2161 2162<h3>2.6.9: Apr 18 2004</h3> 2163<ul> 2164 <li>implement xml:id Working Draft, relaxed XPath id() checking</li> 2165 <li>bugfixes: xmlCtxtReset (Brent Hendricks), line number and CDATA (Dave 2166 Beckett), Relax-NG compilation (William Brack), Regexp patches (with 2167 William), xmlUriEscape (Mark Vakoc), a Relax-NG notAllowed problem (with 2168 William), Relax-NG name classes compares (William), XInclude duplicate 2169 fallback (William), external DTD encoding detection (William), a DTD 2170 validation bug (William), xmlReader Close() fix, recusive extention 2171 schemas</li> 2172 <li>improvements: use xmlRead* APIs in test tools (Mark Vakoc), indenting 2173 save optimization, better handle IIS broken HTTP redirect behaviour (Ian 2174 Hummel), HTML parser frameset (James Bursa), libxml2-python RPM 2175 dependancy, XML Schemas union support (Kasimier Buchcik), warning removal 2176 clanup (William), keep ChangeLog compressed when installing from RPMs</li> 2177 <li>documentation: examples and xmlDocDumpMemory docs (John Fleck), new 2178 example (load, xpath, modify, save), xmlCatalogDump() comments,</li> 2179 <li>Windows: Borland C++ builder (Eric Zurcher), work around Microsoft 2180 compiler NaN handling bug (Mark Vakoc)</li> 2181</ul> 2182 2183<h3>2.6.8: Mar 23 2004</h3> 2184<ul> 2185 <li>First step of the cleanup of the serialization code and APIs</li> 2186 <li>XML Schemas: mixed content (Adam Dickmeiss), QName handling fixes (Adam 2187 Dickmeiss), anyURI for "" (John Belmonte)</li> 2188 <li>Python: Canonicalization C14N support added (Anthony Carrico)</li> 2189 <li>xmlDocCopyNode() extension (William)</li> 2190 <li>Relax-NG: fix when processing XInclude results (William), external 2191 reference in interleave (William), missing error on <choice> 2192 failure (William), memory leak in schemas datatype facets.</li> 2193 <li>xmlWriter: patch for better DTD support (Alfred Mickautsch)</li> 2194 <li>bug fixes: xmlXPathLangFunction memory leak (Mike Hommey and William 2195 Brack), no ID errors if using HTML_PARSE_NOERROR, xmlcatalog fallbacks to 2196 URI on SYSTEM lookup failure, XInclude parse flags inheritance (William), 2197 XInclude and XPointer fixes for entities (William), XML parser bug 2198 reported by Holger Rauch, nanohttp fd leak (William), regexps char 2199 groups '-' handling (William), dictionnary reference counting problems, 2200 do not close stderr.</li> 2201 <li>performance patches from Petr Pajas</li> 2202 <li>Documentation fixes: XML_CATALOG_FILES in man pages (Mike Hommey)</li> 2203 <li>compilation and portability fixes: --without-valid, catalog cleanups 2204 (Peter Breitenlohner), MingW patch (Roland Schwingel), cross-compilation 2205 to Windows (Christophe de Vienne), --with-html-dir fixup (Julio Merino 2206 Vidal), Windows build (Eric Zurcher)</li> 2207</ul> 2208 2209<h3>2.6.7: Feb 23 2004</h3> 2210<ul> 2211 <li>documentation: tutorial updates (John Fleck), benchmark results</li> 2212 <li>xmlWriter: updates and fixes (Alfred Mickautsch, Lucas Brasilino)</li> 2213 <li>XPath optimization (Petr Pajas)</li> 2214 <li>DTD ID handling optimization</li> 2215 <li>bugfixes: xpath number with > 19 fractional (William Brack), push 2216 mode with unescaped '>' characters, fix xmllint --stream --timing, fix 2217 xmllint --memory --stream memory usage, xmlAttrSerializeTxtContent 2218 handling NULL, trying to fix Relax-NG/Perl interface.</li> 2219 <li>python: 2.3 compatibility, whitespace fixes (Malcolm Tredinnick)</li> 2220 <li>Added relaxng option to xmllint --shell</li> 2221</ul> 2222 2223<h3>2.6.6: Feb 12 2004</h3> 2224<ul> 2225 <li>nanohttp and nanoftp: buffer overflow error on URI parsing (Igor and 2226 William) reported by Yuuichi Teranishi</li> 2227 <li>bugfixes: make test and path issues, xmlWriter attribute serialization 2228 (William Brack), xmlWriter indentation (William), schemas validation 2229 (Eric Haszlakiewicz), XInclude dictionnaries issues (William and Oleg 2230 Paraschenko), XInclude empty fallback (William), HTML warnings (William), 2231 XPointer in XInclude (William), Python namespace serialization, 2232 isolat1ToUTF8 bound error (Alfred Mickautsch), output of parameter 2233 entities in internal subset (William), internal subset bug in push mode, 2234 <xs:all> fix (Alexey Sarytchev)</li> 2235 <li>Build: fix for automake-1.8 (Alexander Winston), warnings removal 2236 (Philip Ludlam), SOCKLEN_T detection fixes (Daniel Richard), fix 2237 --with-minimum configuration.</li> 2238 <li>XInclude: allow the 2001 namespace without warning.</li> 2239 <li>Documentation: missing example/index.html (John Fleck), version 2240 dependancies (John Fleck)</li> 2241 <li>reader API: structured error reporting (Steve Ball)</li> 2242 <li>Windows compilation: mingw, msys (Mikhail Grushinskiy), function 2243 prototype (Cameron Johnson), MSVC6 compiler warnings, _WINSOCKAPI_ 2244 patch</li> 2245 <li>Parsers: added xmlByteConsumed(ctxt) API to get the byte offest in 2246 input.</li> 2247</ul> 2248 2249<h3>2.6.5: Jan 25 2004</h3> 2250<ul> 2251 <li>Bugfixes: dictionnaries for schemas (William Brack), regexp segfault 2252 (William), xs:all problem (William), a number of XPointer bugfixes 2253 (William), xmllint error go to stderr, DTD validation problem with 2254 namespace, memory leak (William), SAX1 cleanup and minimal options fixes 2255 (Mark Vadoc), parser context reset on error (Shaun McCance), XPath union 2256 evaluation problem (William) , xmlReallocLoc with NULL (Aleksey Sanin), 2257 XML Schemas double free (Steve Ball), XInclude with no href, argument 2258 callbacks order for XPath callbacks (Frederic Peters)</li> 2259 <li>Documentation: python scripts (William Brack), xslt stylesheets (John 2260 Fleck), doc (Sven Zimmerman), I/O example.</li> 2261 <li>Python bindings: fixes (William), enum support (Stéphane Bidoul), 2262 structured error reporting (Stéphane Bidoul)</li> 2263 <li>XInclude: various fixes for conformance, problem related to dictionnary 2264 references (William & me), recursion (William)</li> 2265 <li>xmlWriter: indentation (Lucas Brasilino), memory leaks (Alfred 2266 Mickautsch),</li> 2267 <li>xmlSchemas: normalizedString datatype (John Belmonte)</li> 2268 <li>code cleanup for strings functions (William)</li> 2269 <li>Windows: compiler patches (Mark Vakoc)</li> 2270 <li>Parser optimizations, a few new XPath and dictionnary APIs for future 2271 XSLT optimizations.</li> 2272</ul> 2273 2274<h3>2.6.4: Dec 24 2003</h3> 2275<ul> 2276 <li>Windows build fixes (Igor Zlatkovic)</li> 2277 <li>Some serious XInclude problems reported by Oleg Paraschenko and</li> 2278 <li>Unix and Makefile packaging fixes (me, William Brack,</li> 2279 <li>Documentation improvements (John Fleck, William Brack), example fix 2280 (Lucas Brasilino)</li> 2281 <li>bugfixes: xmlTextReaderExpand() with xmlReaderWalker, XPath handling of 2282 NULL strings (William Brack) , API building reader or parser from 2283 filedescriptor should not close it, changed XPath sorting to be stable 2284 again (William Brack), xmlGetNodePath() generating '(null)' (William 2285 Brack), DTD validation and namespace bug (William Brack), XML Schemas 2286 double inclusion behaviour</li> 2287</ul> 2288 2289<h3>2.6.3: Dec 10 2003</h3> 2290<ul> 2291 <li>documentation updates and cleanup (DV, William Brack, John Fleck)</li> 2292 <li>added a repository of examples, examples from Aleksey Sanin, Dodji 2293 Seketeli, Alfred Mickautsch</li> 2294 <li>Windows updates: Mark Vakoc, Igor Zlatkovic, Eric Zurcher, Mingw 2295 (Kenneth Haley)</li> 2296 <li>Unicode range checking (William Brack)</li> 2297 <li>code cleanup (William Brack)</li> 2298 <li>Python bindings: doc (John Fleck), bug fixes</li> 2299 <li>UTF-16 cleanup and BOM issues (William Brack)</li> 2300 <li>bug fixes: ID and xmlReader validation, XPath (William Brack), 2301 xmlWriter (Alfred Mickautsch), hash.h inclusion problem, HTML parser 2302 (James Bursa), attribute defaulting and validation, some serialization 2303 cleanups, XML_GET_LINE macro, memory debug when using threads (William 2304 Brack), serialization of attributes and entities content, xmlWriter 2305 (Daniel Schulman)</li> 2306 <li>XInclude bugfix, new APIs and update to the last version including the 2307 namespace change.</li> 2308 <li>XML Schemas improvements: include (Robert Stepanek), import and 2309 namespace handling, fixed the regression tests troubles, added examples 2310 based on Eric van der Vlist book, regexp fixes</li> 2311 <li>preliminary pattern support for streaming (needed for schemas 2312 constraints), added xmlTextReaderPreservePattern() to collect subdocument 2313 when streaming.</li> 2314 <li>various fixes in the structured error handling</li> 2315</ul> 2316 2317<h3>2.6.2: Nov 4 2003</h3> 2318<ul> 2319 <li>XPath context unregistration fixes</li> 2320 <li>text node coalescing fixes (Mark Lilback)</li> 2321 <li>API to screate a W3C Schemas from an existing document (Steve Ball)</li> 2322 <li>BeOS patches (Marcin 'Shard' Konicki)</li> 2323 <li>xmlStrVPrintf function added (Aleksey Sanin)</li> 2324 <li>compilation fixes (Mark Vakoc)</li> 2325 <li>stdin parsing fix (William Brack)</li> 2326 <li>a posteriori DTD validation fixes</li> 2327 <li>xmlReader bug fixes: Walker fixes, python bindings</li> 2328 <li>fixed xmlStopParser() to really stop the parser and errors</li> 2329 <li>always generate line numbers when using the new xmlReadxxx 2330 functions</li> 2331 <li>added XInclude support to the xmlReader interface</li> 2332 <li>implemented XML_PARSE_NONET parser option</li> 2333 <li>DocBook XSLT processing bug fixed</li> 2334 <li>HTML serialization for <p> elements (William Brack and me)</li> 2335 <li>XPointer failure in XInclude are now handled as resource errors</li> 2336 <li>fixed xmllint --html to use the HTML serializer on output (added 2337 --xmlout to implement the previous behaviour of saving it using the XML 2338 serializer)</li> 2339</ul> 2340 2341<h3>2.6.1: Oct 28 2003</h3> 2342<ul> 2343 <li>Mostly bugfixes after the big 2.6.0 changes</li> 2344 <li>Unix compilation patches: libxml.m4 (Patrick Welche), warnings cleanup 2345 (William Brack)</li> 2346 <li>Windows compilation patches (Joachim Bauch, Stephane Bidoul, Igor 2347 Zlatkovic)</li> 2348 <li>xmlWriter bugfix (Alfred Mickautsch)</li> 2349 <li>chvalid.[ch]: couple of fixes from Stephane Bidoul</li> 2350 <li>context reset: error state reset, push parser reset (Graham 2351 Bennett)</li> 2352 <li>context reuse: generate errors if file is not readable</li> 2353 <li>defaulted attributes for element coming from internal entities 2354 (Stephane Bidoul)</li> 2355 <li>Python: tab and spaces mix (William Brack)</li> 2356 <li>Error handler could crash in DTD validation in 2.6.0</li> 2357 <li>xmlReader: do not use the document or element _private field</li> 2358 <li>testSAX.c: avoid a problem with some PIs (Massimo Morara)</li> 2359 <li>general bug fixes: mandatory encoding in text decl, serializing 2360 Document Fragment nodes, xmlSearchNs 2.6.0 problem (Kasimier Buchcik), 2361 XPath errors not reported, slow HTML parsing of large documents.</li> 2362</ul> 2363 2364<h3>2.6.0: Oct 20 2003</h3> 2365<ul> 2366 <li>Major revision release: should be API and ABI compatible but got a lot 2367 of change</li> 2368 <li>Increased the library modularity, far more options can be stripped out, 2369 a --with-minimum configuration will weight around 160KBytes</li> 2370 <li>Use per parser and per document dictionnary, allocate names and small 2371 text nodes from the dictionnary</li> 2372 <li>Switch to a SAX2 like parser rewrote most of the XML parser core, 2373 provides namespace resolution and defaulted attributes, minimize memory 2374 allocations and copies, namespace checking and specific error handling, 2375 immutable buffers, make predefined entities static structures, etc...</li> 2376 <li>rewrote all the error handling in the library, all errors can be 2377 intercepted at a structured level, with precise information 2378 available.</li> 2379 <li>New simpler and more generic XML and HTML parser APIs, allowing to 2380 easilly modify the parsing options and reuse parser context for multiple 2381 consecutive documents.</li> 2382 <li>Similar new APIs for the xmlReader, for options and reuse, provided new 2383 functions to access content as const strings, use them for Python 2384 bindings</li> 2385 <li>a lot of other smaller API improvements: xmlStrPrintf (Aleksey Sanin), 2386 Walker i.e. reader on a document tree based on Alfred Mickautsch code, 2387 make room in nodes for line numbers, reference counting and future PSVI 2388 extensions, generation of character ranges to be checked with faster 2389 algorithm (William), xmlParserMaxDepth (Crutcher Dunnavant), buffer 2390 access</li> 2391 <li>New xmlWriter API provided by Alfred Mickautsch</li> 2392 <li>Schemas: base64 support by Anthony Carrico</li> 2393 <li>Parser<->HTTP integration fix, proper processing of the Mime-Type 2394 and charset information if available.</li> 2395 <li>Relax-NG: bug fixes including the one reported by Martijn Faassen and 2396 zeroOrMore, better error reporting.</li> 2397 <li>Python bindings (Stéphane Bidoul), never use stdout for errors 2398 output</li> 2399 <li>Portability: all the headers have macros for export and calling 2400 convention definitions (Igor Zlatkovic), VMS update (Craig A. Berry), 2401 Windows: threads (Jesse Pelton), Borland compiler (Eric Zurcher, Igor), 2402 Mingw (Igor), typos (Mark Vakoc), beta version (Stephane Bidoul), 2403 warning cleanups on AIX and MIPS compilers (William Brack), BeOS (Marcin 2404 'Shard' Konicki)</li> 2405 <li>Documentation fixes and README (William Brack), search fix (William), 2406 tutorial updates (John Fleck), namespace docs (Stefan Kost)</li> 2407 <li>Bug fixes: xmlCleanupParser (Dave Beckett), threading uninitialized 2408 mutexes, HTML doctype lowercase, SAX/IO (William), compression detection 2409 and restore (William), attribute declaration in DTDs (William), namespace 2410 on attribute in HTML output (William), input filename (Rob Richards), 2411 namespace DTD validation, xmlReplaceNode (Chris Ryland), I/O callbacks 2412 (Markus Keim), CDATA serialization (Shaun McCance), xmlReader (Peter 2413 Derr), high codepoint charref like &#x10FFFF;, buffer access in push 2414 mode (Justin Fletcher), TLS threads on Windows (Jesse Pelton), XPath bug 2415 (William), xmlCleanupParser (Marc Liyanage), CDATA output (William), HTTP 2416 error handling.</li> 2417 <li>xmllint options: --dtdvalidfpi for Tobias Reif, --sax1 for compat 2418 testing, --nodict for building without tree dictionnary, --nocdata to 2419 replace CDATA by text, --nsclean to remove surperfluous namespace 2420 declarations</li> 2421 <li>added xml2-config --libtool-libs option from Kevin P. Fleming</li> 2422 <li>a lot of profiling and tuning of the code, speedup patch for 2423 xmlSearchNs() by Luca Padovani. The xmlReader should do far less 2424 allocation and it speed should get closer to SAX. Chris Anderson worked 2425 on speeding and cleaning up repetitive checking code.</li> 2426 <li>cleanup of "make tests"</li> 2427 <li>libxml-2.0-uninstalled.pc from Malcolm Tredinnick</li> 2428 <li>deactivated the broken docBook SGML parser code and plugged the XML 2429 parser instead.</li> 2430</ul> 2431 2432<h3>2.5.11: Sep 9 2003</h3> 2433 2434<p>A bugfix only release:</p> 2435<ul> 2436 <li>risk of crash in Relax-NG</li> 2437 <li>risk of crash when using multithreaded programs</li> 2438</ul> 2439 2440<h3>2.5.10: Aug 15 2003</h3> 2441 2442<p>A bugfixes only release</p> 2443<ul> 2444 <li>Windows Makefiles (William Brack)</li> 2445 <li>UTF-16 support fixes (Mark Itzcovitz)</li> 2446 <li>Makefile and portability (William Brack) automake, Linux alpha, Mingw 2447 on Windows (Mikhail Grushinskiy)</li> 2448 <li>HTML parser (Oliver Stoeneberg)</li> 2449 <li>XInclude performance problem reported by Kevin Ruscoe</li> 2450 <li>XML parser performance problem reported by Grant Goodale</li> 2451 <li>xmlSAXParseDTD() bug fix from Malcolm Tredinnick</li> 2452 <li>and a couple other cleanup</li> 2453</ul> 2454 2455<h3>2.5.9: Aug 9 2003</h3> 2456<ul> 2457 <li>bugfixes: IPv6 portability, xmlHasNsProp (Markus Keim), Windows build 2458 (Wiliam Brake, Jesse Pelton, Igor), Schemas (Peter Sobisch), threading 2459 (Rob Richards), hexBinary type (), UTF-16 BOM (Dodji Seketeli), 2460 xmlReader, Relax-NG schemas compilation, namespace handling, EXSLT (Sean 2461 Griffin), HTML parsing problem (William Brack), DTD validation for mixed 2462 content + namespaces, HTML serialization, library initialization, 2463 progressive HTML parser</li> 2464 <li>better interfaces for Relax-NG error handling (Joachim Bauch, )</li> 2465 <li>adding xmlXIncludeProcessTree() for XInclud'ing in a subtree</li> 2466 <li>doc fixes and improvements (John Fleck)</li> 2467 <li>configure flag for -with-fexceptions when embedding in C++</li> 2468 <li>couple of new UTF-8 helper functions (William Brack)</li> 2469 <li>general encoding cleanup + ISO-8859-x without iconv (Peter Jacobi)</li> 2470 <li>xmlTextReader cleanup + enum for node types (Bjorn Reese)</li> 2471 <li>general compilation/warning cleanup Solaris/HP-UX/... (William 2472 Brack)</li> 2473</ul> 2474 2475<h3>2.5.8: Jul 6 2003</h3> 2476<ul> 2477 <li>bugfixes: XPath, XInclude, file/URI mapping, UTF-16 save (Mark 2478 Itzcovitz), UTF-8 checking, URI saving, error printing (William Brack), 2479 PI related memleak, compilation without schemas or without xpath (Joerg 2480 Schmitz-Linneweber/Garry Pennington), xmlUnlinkNode problem with DTDs, 2481 rpm problem on , i86_64, removed a few compilation problems from 2.5.7, 2482 xmlIOParseDTD, and xmlSAXParseDTD (Malcolm Tredinnick)</li> 2483 <li>portability: DJGPP (MsDos) , OpenVMS (Craig A. Berry)</li> 2484 <li>William Brack fixed multithreading lock problems</li> 2485 <li>IPv6 patch for FTP and HTTP accesses (Archana Shah/Wipro)</li> 2486 <li>Windows fixes (Igor Zlatkovic, Eric Zurcher), threading (Stéphane 2487 Bidoul)</li> 2488 <li>A few W3C Schemas Structure improvements</li> 2489 <li>W3C Schemas Datatype improvements (Charlie Bozeman)</li> 2490 <li>Python bindings for thread globals (Stéphane Bidoul), and method/class 2491 generator</li> 2492 <li>added --nonet option to xmllint</li> 2493 <li>documentation improvements (John Fleck)</li> 2494</ul> 2495 2496<h3>2.5.7: Apr 25 2003</h3> 2497<ul> 2498 <li>Relax-NG: Compiling to regexp and streaming validation on top of the 2499 xmlReader interface, added to xmllint --stream</li> 2500 <li>xmlReader: Expand(), Next() and DOM access glue, bug fixes</li> 2501 <li>Support for large files: RGN validated a 4.5GB instance</li> 2502 <li>Thread support is now configured in by default</li> 2503 <li>Fixes: update of the Trio code (Bjorn), WXS Date and Duration fixes 2504 (Charles Bozeman), DTD and namespaces (Brent Hendricks), HTML push parser 2505 and zero bytes handling, some missing Windows file path conversions, 2506 behaviour of the parser and validator in the presence of "out of memory" 2507 error conditions</li> 2508 <li>extended the API to be able to plug a garbage collecting memory 2509 allocator, added xmlMallocAtomic() and modified the allocations 2510 accordingly.</li> 2511 <li>Performances: removed excessive malloc() calls, speedup of the push and 2512 xmlReader interfaces, removed excessive thread locking</li> 2513 <li>Documentation: man page (John Fleck), xmlReader documentation</li> 2514 <li>Python: adding binding for xmlCatalogAddLocal (Brent M Hendricks)</li> 2515</ul> 2516 2517<h3>2.5.6: Apr 1 2003</h3> 2518<ul> 2519 <li>Fixed W3C XML Schemas datatype, should be compliant now except for 2520 binHex and base64 which are not supported yet.</li> 2521 <li>bug fixes: non-ASCII IDs, HTML output, XInclude on large docs and 2522 XInclude entities handling, encoding detection on external subsets, XML 2523 Schemas bugs and memory leaks, HTML parser (James Bursa)</li> 2524 <li>portability: python/trio (Albert Chin), Sun compiler warnings</li> 2525 <li>documentation: added --relaxng option to xmllint man page (John)</li> 2526 <li>improved error reporting: xml:space, start/end tag mismatches, Relax NG 2527 errors</li> 2528</ul> 2529 2530<h3>2.5.5: Mar 24 2003</h3> 2531<ul> 2532 <li>Lot of fixes on the Relax NG implementation. More testing including 2533 DocBook and TEI examples.</li> 2534 <li>Increased the support for W3C XML Schemas datatype</li> 2535 <li>Several bug fixes in the URI handling layer</li> 2536 <li>Bug fixes: HTML parser, xmlReader, DTD validation, XPath, encoding 2537 conversion, line counting in the parser.</li> 2538 <li>Added support for $XMLLINT_INDENT environment variable, FTP delete</li> 2539 <li>Fixed the RPM spec file name</li> 2540</ul> 2541 2542<h3>2.5.4: Feb 20 2003</h3> 2543<ul> 2544 <li>Conformance testing and lot of fixes on Relax NG and XInclude 2545 implementation</li> 2546 <li>Implementation of XPointer element() scheme</li> 2547 <li>Bug fixes: XML parser, XInclude entities merge, validity checking on 2548 namespaces, 2549 <p>2 serialization bugs, node info generation problems, a DTD regexp 2550 generation problem.</p> 2551 </li> 2552 <li>Portability: windows updates and path canonicalization (Igor)</li> 2553 <li>A few typo fixes (Kjartan Maraas)</li> 2554 <li>Python bindings generator fixes (Stephane Bidoul)</li> 2555</ul> 2556 2557<h3>2.5.3: Feb 10 2003</h3> 2558<ul> 2559 <li>RelaxNG and XML Schemas datatypes improvements, and added a first 2560 version of RelaxNG Python bindings</li> 2561 <li>Fixes: XLink (Sean Chittenden), XInclude (Sean Chittenden), API fix for 2562 serializing namespace nodes, encoding conversion bug, XHTML1 2563 serialization</li> 2564 <li>Portability fixes: Windows (Igor), AMD 64bits RPM spec file</li> 2565</ul> 2566 2567<h3>2.5.2: Feb 5 2003</h3> 2568<ul> 2569 <li>First implementation of RelaxNG, added --relaxng flag to xmllint</li> 2570 <li>Schemas support now compiled in by default.</li> 2571 <li>Bug fixes: DTD validation, namespace checking, XInclude and entities, 2572 delegateURI in XML Catalogs, HTML parser, XML reader (Stéphane Bidoul), 2573 XPath parser and evaluation, UTF8ToUTF8 serialization, XML reader memory 2574 consumption, HTML parser, HTML serialization in the presence of 2575 namespaces</li> 2576 <li>added an HTML API to check elements and attributes.</li> 2577 <li>Documentation improvement, PDF for the tutorial (John Fleck), doc 2578 patches (Stefan Kost)</li> 2579 <li>Portability fixes: NetBSD (Julio Merino), Windows (Igor Zlatkovic)</li> 2580 <li>Added python bindings for XPointer, contextual error reporting 2581 (Stéphane Bidoul)</li> 2582 <li>URI/file escaping problems (Stefano Zacchiroli)</li> 2583</ul> 2584 2585<h3>2.5.1: Jan 8 2003</h3> 2586<ul> 2587 <li>Fixes a memory leak and configuration/compilation problems in 2.5.0</li> 2588 <li>documentation updates (John)</li> 2589 <li>a couple of XmlTextReader fixes</li> 2590</ul> 2591 2592<h3>2.5.0: Jan 6 2003</h3> 2593<ul> 2594 <li>New <a href="xmlreader.html">XmltextReader interface</a> based on C# 2595 API (with help of Stéphane Bidoul)</li> 2596 <li>Windows: more exports, including the new API (Igor)</li> 2597 <li>XInclude fallback fix</li> 2598 <li>Python: bindings for the new API, packaging (Stéphane Bidoul), 2599 drv_libxml2.py Python xml.sax driver (Stéphane Bidoul), fixes, speedup 2600 and iterators for Python-2.2 (Hannu Krosing)</li> 2601 <li>Tutorial fixes (john Fleck and Niraj Tolia) xmllint man update 2602 (John)</li> 2603 <li>Fix an XML parser bug raised by Vyacheslav Pindyura</li> 2604 <li>Fix for VMS serialization (Nigel Hall) and config (Craig A. Berry)</li> 2605 <li>Entities handling fixes</li> 2606 <li>new API to optionally track node creation and deletion (Lukas 2607 Schroeder)</li> 2608 <li>Added documentation for the XmltextReader interface and some <a 2609 href="guidelines.html">XML guidelines</a></li> 2610</ul> 2611 2612<h3>2.4.30: Dec 12 2002</h3> 2613<ul> 2614 <li>2.4.29 broke the python bindings, rereleasing</li> 2615 <li>Improvement/fixes of the XML API generator, and couple of minor code 2616 fixes.</li> 2617</ul> 2618 2619<h3>2.4.29: Dec 11 2002</h3> 2620<ul> 2621 <li>Windows fixes (Igor): Windows CE port, pthread linking, python bindings 2622 (Stéphane Bidoul), Mingw (Magnus Henoch), and export list updates</li> 2623 <li>Fix for prev in python bindings (ERDI Gergo)</li> 2624 <li>Fix for entities handling (Marcus Clarke)</li> 2625 <li>Refactored the XML and HTML dumps to a single code path, fixed XHTML1 2626 dump</li> 2627 <li>Fix for URI parsing when handling URNs with fragment identifiers</li> 2628 <li>Fix for HTTP URL escaping problem</li> 2629 <li>added an TextXmlReader (C#) like API (work in progress)</li> 2630 <li>Rewrote the API in XML generation script, includes a C parser and saves 2631 more information needed for C# bindings</li> 2632</ul> 2633 2634<h3>2.4.28: Nov 22 2002</h3> 2635<ul> 2636 <li>a couple of python binding fixes</li> 2637 <li>2 bug fixes in the XML push parser</li> 2638 <li>potential memory leak removed (Martin Stoilov)</li> 2639 <li>fix to the configure script for Unix (Dimitri Papadopoulos)</li> 2640 <li>added encoding support for XInclude parse="text"</li> 2641 <li>autodetection of XHTML1 and specific serialization rules added</li> 2642 <li>nasty threading bug fixed (William Brack)</li> 2643</ul> 2644 2645<h3>2.4.27: Nov 17 2002</h3> 2646<ul> 2647 <li>fixes for the Python bindings</li> 2648 <li>a number of bug fixes: SGML catalogs, xmlParseBalancedChunkMemory(), 2649 HTML parser, Schemas (Charles Bozeman), document fragment support 2650 (Christian Glahn), xmlReconciliateNs (Brian Stafford), XPointer, 2651 xmlFreeNode(), xmlSAXParseMemory (Peter Jones), xmlGetNodePath (Petr 2652 Pajas), entities processing</li> 2653 <li>added grep to xmllint --shell</li> 2654 <li>VMS update patch from Craig A. Berry</li> 2655 <li>cleanup of the Windows build with support for more compilers (Igor), 2656 better thread support on Windows</li> 2657 <li>cleanup of Unix Makefiles and spec file</li> 2658 <li>Improvements to the documentation (John Fleck)</li> 2659</ul> 2660 2661<h3>2.4.26: Oct 18 2002</h3> 2662<ul> 2663 <li>Patches for Windows CE port, improvements on Windows paths handling</li> 2664 <li>Fixes to the validation code (DTD and Schemas), xmlNodeGetPath() , 2665 HTML serialization, Namespace compliance, and a number of small 2666 problems</li> 2667</ul> 2668 2669<h3>2.4.25: Sep 26 2002</h3> 2670<ul> 2671 <li>A number of bug fixes: XPath, validation, Python bindings, DOM and 2672 tree, xmlI/O, Html</li> 2673 <li>Serious rewrite of XInclude</li> 2674 <li>Made XML Schemas regexp part of the default build and APIs, small fix 2675 and improvement of the regexp core</li> 2676 <li>Changed the validation code to reuse XML Schemas regexp APIs</li> 2677 <li>Better handling of Windows file paths, improvement of Makefiles (Igor, 2678 Daniel Gehriger, Mark Vakoc)</li> 2679 <li>Improved the python I/O bindings, the tests, added resolver and regexp 2680 APIs</li> 2681 <li>New logos from Marc Liyanage</li> 2682 <li>Tutorial improvements: John Fleck, Christopher Harris</li> 2683 <li>Makefile: Fixes for AMD x86_64 (Mandrake), DESTDIR (Christophe 2684 Merlet)</li> 2685 <li>removal of all stderr/perror use for error reporting</li> 2686 <li>Better error reporting: XPath and DTD validation</li> 2687 <li>update of the trio portability layer (Bjorn Reese)</li> 2688</ul> 2689 2690<p><strong>2.4.24: Aug 22 2002</strong></p> 2691<ul> 2692 <li>XPath fixes (William), xf:escape-uri() (Wesley Terpstra)</li> 2693 <li>Python binding fixes: makefiles (William), generator, rpm build, x86-64 2694 (fcrozat)</li> 2695 <li>HTML <style> and boolean attributes serializer fixes</li> 2696 <li>C14N improvements by Aleksey</li> 2697 <li>doc cleanups: Rick Jones</li> 2698 <li>Windows compiler makefile updates: Igor and Elizabeth Barham</li> 2699 <li>XInclude: implementation of fallback and xml:base fixup added</li> 2700</ul> 2701 2702<h3>2.4.23: July 6 2002</h3> 2703<ul> 2704 <li>performances patches: Peter Jacobi</li> 2705 <li>c14n fixes, testsuite and performances: Aleksey Sanin</li> 2706 <li>added xmlDocFormatDump: Chema Celorio</li> 2707 <li>new tutorial: John Fleck</li> 2708 <li>new hash functions and performances: Sander Vesik, portability fix from 2709 Peter Jacobi</li> 2710 <li>a number of bug fixes: XPath (William Brack, Richard Jinks), XML and 2711 HTML parsers, ID lookup function</li> 2712 <li>removal of all remaining sprintf: Aleksey Sanin</li> 2713</ul> 2714 2715<h3>2.4.22: May 27 2002</h3> 2716<ul> 2717 <li>a number of bug fixes: configure scripts, base handling, parser, memory 2718 usage, HTML parser, XPath, documentation (Christian Cornelssen), 2719 indentation, URI parsing</li> 2720 <li>Optimizations for XMLSec, fixing and making public some of the network 2721 protocol handlers (Aleksey)</li> 2722 <li>performance patch from Gary Pennington</li> 2723 <li>Charles Bozeman provided date and time support for XML Schemas 2724 datatypes</li> 2725</ul> 2726 2727<h3>2.4.21: Apr 29 2002</h3> 2728 2729<p>This release is both a bug fix release and also contains the early XML 2730Schemas <a href="http://www.w3.org/TR/xmlschema-1/">structures</a> and <a 2731href="http://www.w3.org/TR/xmlschema-2/">datatypes</a> code, beware, all 2732interfaces are likely to change, there is huge holes, it is clearly a work in 2733progress and don't even think of putting this code in a production system, 2734it's actually not compiled in by default. The real fixes are: 2735</p> 2736 2737<ul> 2738 <li>a couple of bugs or limitations introduced in 2.4.20</li> 2739 <li>patches for Borland C++ and MSC by Igor</li> 2740 <li>some fixes on XPath strings and conformance patches by Richard 2741 Jinks</li> 2742 <li>patch from Aleksey for the ExcC14N specification</li> 2743 <li>OSF/1 bug fix by Bjorn</li> 2744</ul> 2745 2746<h3>2.4.20: Apr 15 2002</h3> 2747<ul> 2748 <li>bug fixes: file descriptor leak, XPath, HTML output, DTD validation</li> 2749 <li>XPath conformance testing by Richard Jinks</li> 2750 <li>Portability fixes: Solaris, MPE/iX, Windows, OSF/1, python bindings, 2751 libxml.m4</li> 2752</ul> 2753 2754<h3>2.4.19: Mar 25 2002</h3> 2755<ul> 2756 <li>bug fixes: half a dozen XPath bugs, Validation, ISO-Latin to UTF8 2757 encoder</li> 2758 <li>portability fixes in the HTTP code</li> 2759 <li>memory allocation checks using valgrind, and profiling tests</li> 2760 <li>revamp of the Windows build and Makefiles</li> 2761</ul> 2762 2763<h3>2.4.18: Mar 18 2002</h3> 2764<ul> 2765 <li>bug fixes: tree, SAX, canonicalization, validation, portability, 2766 XPath</li> 2767 <li>removed the --with-buffer option it was becoming unmaintainable</li> 2768 <li>serious cleanup of the Python makefiles</li> 2769 <li>speedup patch to XPath very effective for DocBook stylesheets</li> 2770 <li>Fixes for Windows build, cleanup of the documentation</li> 2771</ul> 2772 2773<h3>2.4.17: Mar 8 2002</h3> 2774<ul> 2775 <li>a lot of bug fixes, including "namespace nodes have no parents in 2776 XPath"</li> 2777 <li>fixed/improved the Python wrappers, added more examples and more 2778 regression tests, XPath extension functions can now return node-sets</li> 2779 <li>added the XML Canonicalization support from Aleksey Sanin</li> 2780</ul> 2781 2782<h3>2.4.16: Feb 20 2002</h3> 2783<ul> 2784 <li>a lot of bug fixes, most of them were triggered by the XML Testsuite 2785 from OASIS and W3C. Compliance has been significantly improved.</li> 2786 <li>a couple of portability fixes too.</li> 2787</ul> 2788 2789<h3>2.4.15: Feb 11 2002</h3> 2790<ul> 2791 <li>Fixed the Makefiles, especially the python module ones</li> 2792 <li>A few bug fixes and cleanup</li> 2793 <li>Includes cleanup</li> 2794</ul> 2795 2796<h3>2.4.14: Feb 8 2002</h3> 2797<ul> 2798 <li>Change of License to the <a 2799 href="http://www.opensource.org/licenses/mit-license.html">MIT 2800 License</a> basically for integration in XFree86 codebase, and removing 2801 confusion around the previous dual-licensing</li> 2802 <li>added Python bindings, beta software but should already be quite 2803 complete</li> 2804 <li>a large number of fixes and cleanups, especially for all tree 2805 manipulations</li> 2806 <li>cleanup of the headers, generation of a reference API definition in 2807 XML</li> 2808</ul> 2809 2810<h3>2.4.13: Jan 14 2002</h3> 2811<ul> 2812 <li>update of the documentation: John Fleck and Charlie Bozeman</li> 2813 <li>cleanup of timing code from Justin Fletcher</li> 2814 <li>fixes for Windows and initial thread support on Win32: Igor and Serguei 2815 Narojnyi</li> 2816 <li>Cygwin patch from Robert Collins</li> 2817 <li>added xmlSetEntityReferenceFunc() for Keith Isdale work on xsldbg</li> 2818</ul> 2819 2820<h3>2.4.12: Dec 7 2001</h3> 2821<ul> 2822 <li>a few bug fixes: thread (Gary Pennington), xmllint (Geert Kloosterman), 2823 XML parser (Robin Berjon), XPointer (Danny Jamshy), I/O cleanups 2824 (robert)</li> 2825 <li>Eric Lavigne contributed project files for MacOS</li> 2826 <li>some makefiles cleanups</li> 2827</ul> 2828 2829<h3>2.4.11: Nov 26 2001</h3> 2830<ul> 2831 <li>fixed a couple of errors in the includes, fixed a few bugs, some code 2832 cleanups</li> 2833 <li>xmllint man pages improvement by Heiko Rupp</li> 2834 <li>updated VMS build instructions from John A Fotheringham</li> 2835 <li>Windows Makefiles updates from Igor</li> 2836</ul> 2837 2838<h3>2.4.10: Nov 10 2001</h3> 2839<ul> 2840 <li>URI escaping fix (Joel Young)</li> 2841 <li>added xmlGetNodePath() (for paths or XPointers generation)</li> 2842 <li>Fixes namespace handling problems when using DTD and validation</li> 2843 <li>improvements on xmllint: Morus Walter patches for --format and 2844 --encode, Stefan Kost and Heiko Rupp improvements on the --shell</li> 2845 <li>fixes for xmlcatalog linking pointed by Weiqi Gao</li> 2846 <li>fixes to the HTML parser</li> 2847</ul> 2848 2849<h3>2.4.9: Nov 6 2001</h3> 2850<ul> 2851 <li>fixes more catalog bugs</li> 2852 <li>avoid a compilation problem, improve xmlGetLineNo()</li> 2853</ul> 2854 2855<h3>2.4.8: Nov 4 2001</h3> 2856<ul> 2857 <li>fixed SGML catalogs broken in previous release, updated xmlcatalog 2858 tool</li> 2859 <li>fixed a compile errors and some includes troubles.</li> 2860</ul> 2861 2862<h3>2.4.7: Oct 30 2001</h3> 2863<ul> 2864 <li>exported some debugging interfaces</li> 2865 <li>serious rewrite of the catalog code</li> 2866 <li>integrated Gary Pennington thread safety patch, added configure option 2867 and regression tests</li> 2868 <li>removed an HTML parser bug</li> 2869 <li>fixed a couple of potentially serious validation bugs</li> 2870 <li>integrated the SGML DocBook support in xmllint</li> 2871 <li>changed the nanoftp anonymous login passwd</li> 2872 <li>some I/O cleanup and a couple of interfaces for Perl wrapper</li> 2873 <li>general bug fixes</li> 2874 <li>updated xmllint man page by John Fleck</li> 2875 <li>some VMS and Windows updates</li> 2876</ul> 2877 2878<h3>2.4.6: Oct 10 2001</h3> 2879<ul> 2880 <li>added an updated man pages by John Fleck</li> 2881 <li>portability and configure fixes</li> 2882 <li>an infinite loop on the HTML parser was removed (William)</li> 2883 <li>Windows makefile patches from Igor</li> 2884 <li>fixed half a dozen bugs reported for libxml or libxslt</li> 2885 <li>updated xmlcatalog to be able to modify SGML super catalogs</li> 2886</ul> 2887 2888<h3>2.4.5: Sep 14 2001</h3> 2889<ul> 2890 <li>Remove a few annoying bugs in 2.4.4</li> 2891 <li>forces the HTML serializer to output decimal charrefs since some 2892 version of Netscape can't handle hexadecimal ones</li> 2893</ul> 2894 2895<h3>1.8.16: Sep 14 2001</h3> 2896<ul> 2897 <li>maintenance release of the old libxml1 branch, couple of bug and 2898 portability fixes</li> 2899</ul> 2900 2901<h3>2.4.4: Sep 12 2001</h3> 2902<ul> 2903 <li>added --convert to xmlcatalog, bug fixes and cleanups of XML 2904 Catalog</li> 2905 <li>a few bug fixes and some portability changes</li> 2906 <li>some documentation cleanups</li> 2907</ul> 2908 2909<h3>2.4.3: Aug 23 2001</h3> 2910<ul> 2911 <li>XML Catalog support see the doc</li> 2912 <li>New NaN/Infinity floating point code</li> 2913 <li>A few bug fixes</li> 2914</ul> 2915 2916<h3>2.4.2: Aug 15 2001</h3> 2917<ul> 2918 <li>adds xmlLineNumbersDefault() to control line number generation</li> 2919 <li>lot of bug fixes</li> 2920 <li>the Microsoft MSC projects files should now be up to date</li> 2921 <li>inheritance of namespaces from DTD defaulted attributes</li> 2922 <li>fixes a serious potential security bug</li> 2923 <li>added a --format option to xmllint</li> 2924</ul> 2925 2926<h3>2.4.1: July 24 2001</h3> 2927<ul> 2928 <li>possibility to keep line numbers in the tree</li> 2929 <li>some computation NaN fixes</li> 2930 <li>extension of the XPath API</li> 2931 <li>cleanup for alpha and ia64 targets</li> 2932 <li>patch to allow saving through HTTP PUT or POST</li> 2933</ul> 2934 2935<h3>2.4.0: July 10 2001</h3> 2936<ul> 2937 <li>Fixed a few bugs in XPath, validation, and tree handling.</li> 2938 <li>Fixed XML Base implementation, added a couple of examples to the 2939 regression tests</li> 2940 <li>A bit of cleanup</li> 2941</ul> 2942 2943<h3>2.3.14: July 5 2001</h3> 2944<ul> 2945 <li>fixed some entities problems and reduce memory requirement when 2946 substituting them</li> 2947 <li>lots of improvements in the XPath queries interpreter can be 2948 substantially faster</li> 2949 <li>Makefiles and configure cleanups</li> 2950 <li>Fixes to XPath variable eval, and compare on empty node set</li> 2951 <li>HTML tag closing bug fixed</li> 2952 <li>Fixed an URI reference computation problem when validating</li> 2953</ul> 2954 2955<h3>2.3.13: June 28 2001</h3> 2956<ul> 2957 <li>2.3.12 configure.in was broken as well as the push mode XML parser</li> 2958 <li>a few more fixes for compilation on Windows MSC by Yon Derek</li> 2959</ul> 2960 2961<h3>1.8.14: June 28 2001</h3> 2962<ul> 2963 <li>Zbigniew Chyla gave a patch to use the old XML parser in push mode</li> 2964 <li>Small Makefile fix</li> 2965</ul> 2966 2967<h3>2.3.12: June 26 2001</h3> 2968<ul> 2969 <li>lots of cleanup</li> 2970 <li>a couple of validation fix</li> 2971 <li>fixed line number counting</li> 2972 <li>fixed serious problems in the XInclude processing</li> 2973 <li>added support for UTF8 BOM at beginning of entities</li> 2974 <li>fixed a strange gcc optimizer bugs in xpath handling of float, gcc-3.0 2975 miscompile uri.c (William), Thomas Leitner provided a fix for the 2976 optimizer on Tru64</li> 2977 <li>incorporated Yon Derek and Igor Zlatkovic fixes and improvements for 2978 compilation on Windows MSC</li> 2979 <li>update of libxml-doc.el (Felix Natter)</li> 2980 <li>fixed 2 bugs in URI normalization code</li> 2981</ul> 2982 2983<h3>2.3.11: June 17 2001</h3> 2984<ul> 2985 <li>updates to trio, Makefiles and configure should fix some portability 2986 problems (alpha)</li> 2987 <li>fixed some HTML serialization problems (pre, script, and block/inline 2988 handling), added encoding aware APIs, cleanup of this code</li> 2989 <li>added xmlHasNsProp()</li> 2990 <li>implemented a specific PI for encoding support in the DocBook SGML 2991 parser</li> 2992 <li>some XPath fixes (-Infinity, / as a function parameter and namespaces 2993 node selection)</li> 2994 <li>fixed a performance problem and an error in the validation code</li> 2995 <li>fixed XInclude routine to implement the recursive behaviour</li> 2996 <li>fixed xmlFreeNode problem when libxml is included statically twice</li> 2997 <li>added --version to xmllint for bug reports</li> 2998</ul> 2999 3000<h3>2.3.10: June 1 2001</h3> 3001<ul> 3002 <li>fixed the SGML catalog support</li> 3003 <li>a number of reported bugs got fixed, in XPath, iconv detection, 3004 XInclude processing</li> 3005 <li>XPath string function should now handle unicode correctly</li> 3006</ul> 3007 3008<h3>2.3.9: May 19 2001</h3> 3009 3010<p>Lots of bugfixes, and added a basic SGML catalog support: 3011</p> 3012<ul> 3013 <li>HTML push bugfix #54891 and another patch from Jonas Borgstrom</li> 3014 <li>some serious speed optimization again</li> 3015 <li>some documentation cleanups</li> 3016 <li>trying to get better linking on Solaris (-R)</li> 3017 <li>XPath API cleanup from Thomas Broyer</li> 3018 <li>Validation bug fixed #54631, added a patch from Gary Pennington, fixed 3019 xmlValidGetValidElements()</li> 3020 <li>Added an INSTALL file</li> 3021 <li>Attribute removal added to API: #54433</li> 3022 <li>added a basic support for SGML catalogs</li> 3023 <li>fixed xmlKeepBlanksDefault(0) API</li> 3024 <li>bugfix in xmlNodeGetLang()</li> 3025 <li>fixed a small configure portability problem</li> 3026 <li>fixed an inversion of SYSTEM and PUBLIC identifier in HTML document</li> 3027</ul> 3028 3029<h3>1.8.13: May 14 2001</h3> 3030<ul> 3031 <li>bugfixes release of the old libxml1 branch used by Gnome</li> 3032</ul> 3033 3034<h3>2.3.8: May 3 2001</h3> 3035<ul> 3036 <li>Integrated an SGML DocBook parser for the Gnome project</li> 3037 <li>Fixed a few things in the HTML parser</li> 3038 <li>Fixed some XPath bugs raised by XSLT use, tried to fix the floating 3039 point portability issue</li> 3040 <li>Speed improvement (8M/s for SAX, 3M/s for DOM, 1.5M/s for 3041 DOM+validation using the XML REC as input and a 700MHz celeron).</li> 3042 <li>incorporated more Windows cleanup</li> 3043 <li>added xmlSaveFormatFile()</li> 3044 <li>fixed problems in copying nodes with entities references (gdome)</li> 3045 <li>removed some troubles surrounding the new validation module</li> 3046</ul> 3047 3048<h3>2.3.7: April 22 2001</h3> 3049<ul> 3050 <li>lots of small bug fixes, corrected XPointer</li> 3051 <li>Non deterministic content model validation support</li> 3052 <li>added xmlDocCopyNode for gdome2</li> 3053 <li>revamped the way the HTML parser handles end of tags</li> 3054 <li>XPath: corrections of namespaces support and number formatting</li> 3055 <li>Windows: Igor Zlatkovic patches for MSC compilation</li> 3056 <li>HTML output fixes from P C Chow and William M. Brack</li> 3057 <li>Improved validation speed sensible for DocBook</li> 3058 <li>fixed a big bug with ID declared in external parsed entities</li> 3059 <li>portability fixes, update of Trio from Bjorn Reese</li> 3060</ul> 3061 3062<h3>2.3.6: April 8 2001</h3> 3063<ul> 3064 <li>Code cleanup using extreme gcc compiler warning options, found and 3065 cleared half a dozen potential problem</li> 3066 <li>the Eazel team found an XML parser bug</li> 3067 <li>cleaned up the user of some of the string formatting function. used the 3068 trio library code to provide the one needed when the platform is missing 3069 them</li> 3070 <li>xpath: removed a memory leak and fixed the predicate evaluation 3071 problem, extended the testsuite and cleaned up the result. XPointer seems 3072 broken ...</li> 3073</ul> 3074 3075<h3>2.3.5: Mar 23 2001</h3> 3076<ul> 3077 <li>Biggest change is separate parsing and evaluation of XPath expressions, 3078 there is some new APIs for this too</li> 3079 <li>included a number of bug fixes(XML push parser, 51876, notations, 3080 52299)</li> 3081 <li>Fixed some portability issues</li> 3082</ul> 3083 3084<h3>2.3.4: Mar 10 2001</h3> 3085<ul> 3086 <li>Fixed bugs #51860 and #51861</li> 3087 <li>Added a global variable xmlDefaultBufferSize to allow default buffer 3088 size to be application tunable.</li> 3089 <li>Some cleanup in the validation code, still a bug left and this part 3090 should probably be rewritten to support ambiguous content model :-\</li> 3091 <li>Fix a couple of serious bugs introduced or raised by changes in 2.3.3 3092 parser</li> 3093 <li>Fixed another bug in xmlNodeGetContent()</li> 3094 <li>Bjorn fixed XPath node collection and Number formatting</li> 3095 <li>Fixed a loop reported in the HTML parsing</li> 3096 <li>blank space are reported even if the Dtd content model proves that they 3097 are formatting spaces, this is for XML conformance</li> 3098</ul> 3099 3100<h3>2.3.3: Mar 1 2001</h3> 3101<ul> 3102 <li>small change in XPath for XSLT</li> 3103 <li>documentation cleanups</li> 3104 <li>fix in validation by Gary Pennington</li> 3105 <li>serious parsing performances improvements</li> 3106</ul> 3107 3108<h3>2.3.2: Feb 24 2001</h3> 3109<ul> 3110 <li>chasing XPath bugs, found a bunch, completed some TODO</li> 3111 <li>fixed a Dtd parsing bug</li> 3112 <li>fixed a bug in xmlNodeGetContent</li> 3113 <li>ID/IDREF support partly rewritten by Gary Pennington</li> 3114</ul> 3115 3116<h3>2.3.1: Feb 15 2001</h3> 3117<ul> 3118 <li>some XPath and HTML bug fixes for XSLT</li> 3119 <li>small extension of the hash table interfaces for DOM gdome2 3120 implementation</li> 3121 <li>A few bug fixes</li> 3122</ul> 3123 3124<h3>2.3.0: Feb 8 2001 (2.2.12 was on 25 Jan but I didn't kept track)</h3> 3125<ul> 3126 <li>Lots of XPath bug fixes</li> 3127 <li>Add a mode with Dtd lookup but without validation error reporting for 3128 XSLT</li> 3129 <li>Add support for text node without escaping (XSLT)</li> 3130 <li>bug fixes for xmlCheckFilename</li> 3131 <li>validation code bug fixes from Gary Pennington</li> 3132 <li>Patch from Paul D. Smith correcting URI path normalization</li> 3133 <li>Patch to allow simultaneous install of libxml-devel and 3134 libxml2-devel</li> 3135 <li>the example Makefile is now fixed</li> 3136 <li>added HTML to the RPM packages</li> 3137 <li>tree copying bugfixes</li> 3138 <li>updates to Windows makefiles</li> 3139 <li>optimization patch from Bjorn Reese</li> 3140</ul> 3141 3142<h3>2.2.11: Jan 4 2001</h3> 3143<ul> 3144 <li>bunch of bug fixes (memory I/O, xpath, ftp/http, ...)</li> 3145 <li>added htmlHandleOmittedElem()</li> 3146 <li>Applied Bjorn Reese's IPV6 first patch</li> 3147 <li>Applied Paul D. Smith patches for validation of XInclude results</li> 3148 <li>added XPointer xmlns() new scheme support</li> 3149</ul> 3150 3151<h3>2.2.10: Nov 25 2000</h3> 3152<ul> 3153 <li>Fix the Windows problems of 2.2.8</li> 3154 <li>integrate OpenVMS patches</li> 3155 <li>better handling of some nasty HTML input</li> 3156 <li>Improved the XPointer implementation</li> 3157 <li>integrate a number of provided patches</li> 3158</ul> 3159 3160<h3>2.2.9: Nov 25 2000</h3> 3161<ul> 3162 <li>erroneous release :-(</li> 3163</ul> 3164 3165<h3>2.2.8: Nov 13 2000</h3> 3166<ul> 3167 <li>First version of <a href="http://www.w3.org/TR/xinclude">XInclude</a> 3168 support</li> 3169 <li>Patch in conditional section handling</li> 3170 <li>updated MS compiler project</li> 3171 <li>fixed some XPath problems</li> 3172 <li>added an URI escaping function</li> 3173 <li>some other bug fixes</li> 3174</ul> 3175 3176<h3>2.2.7: Oct 31 2000</h3> 3177<ul> 3178 <li>added message redirection</li> 3179 <li>XPath improvements (thanks TOM !)</li> 3180 <li>xmlIOParseDTD() added</li> 3181 <li>various small fixes in the HTML, URI, HTTP and XPointer support</li> 3182 <li>some cleanup of the Makefile, autoconf and the distribution content</li> 3183</ul> 3184 3185<h3>2.2.6: Oct 25 2000:</h3> 3186<ul> 3187 <li>Added an hash table module, migrated a number of internal structure to 3188 those</li> 3189 <li>Fixed a posteriori validation problems</li> 3190 <li>HTTP module cleanups</li> 3191 <li>HTML parser improvements (tag errors, script/style handling, attribute 3192 normalization)</li> 3193 <li>coalescing of adjacent text nodes</li> 3194 <li>couple of XPath bug fixes, exported the internal API</li> 3195</ul> 3196 3197<h3>2.2.5: Oct 15 2000:</h3> 3198<ul> 3199 <li>XPointer implementation and testsuite</li> 3200 <li>Lot of XPath fixes, added variable and functions registration, more 3201 tests</li> 3202 <li>Portability fixes, lots of enhancements toward an easy Windows build 3203 and release</li> 3204 <li>Late validation fixes</li> 3205 <li>Integrated a lot of contributed patches</li> 3206 <li>added memory management docs</li> 3207 <li>a performance problem when using large buffer seems fixed</li> 3208</ul> 3209 3210<h3>2.2.4: Oct 1 2000:</h3> 3211<ul> 3212 <li>main XPath problem fixed</li> 3213 <li>Integrated portability patches for Windows</li> 3214 <li>Serious bug fixes on the URI and HTML code</li> 3215</ul> 3216 3217<h3>2.2.3: Sep 17 2000</h3> 3218<ul> 3219 <li>bug fixes</li> 3220 <li>cleanup of entity handling code</li> 3221 <li>overall review of all loops in the parsers, all sprintf usage has been 3222 checked too</li> 3223 <li>Far better handling of larges Dtd. Validating against DocBook XML Dtd 3224 works smoothly now.</li> 3225</ul> 3226 3227<h3>1.8.10: Sep 6 2000</h3> 3228<ul> 3229 <li>bug fix release for some Gnome projects</li> 3230</ul> 3231 3232<h3>2.2.2: August 12 2000</h3> 3233<ul> 3234 <li>mostly bug fixes</li> 3235 <li>started adding routines to access xml parser context options</li> 3236</ul> 3237 3238<h3>2.2.1: July 21 2000</h3> 3239<ul> 3240 <li>a purely bug fixes release</li> 3241 <li>fixed an encoding support problem when parsing from a memory block</li> 3242 <li>fixed a DOCTYPE parsing problem</li> 3243 <li>removed a bug in the function allowing to override the memory 3244 allocation routines</li> 3245</ul> 3246 3247<h3>2.2.0: July 14 2000</h3> 3248<ul> 3249 <li>applied a lot of portability fixes</li> 3250 <li>better encoding support/cleanup and saving (content is now always 3251 encoded in UTF-8)</li> 3252 <li>the HTML parser now correctly handles encodings</li> 3253 <li>added xmlHasProp()</li> 3254 <li>fixed a serious problem with &#38;</li> 3255 <li>propagated the fix to FTP client</li> 3256 <li>cleanup, bugfixes, etc ...</li> 3257 <li>Added a page about <a href="encoding.html">libxml Internationalization 3258 support</a></li> 3259</ul> 3260 3261<h3>1.8.9: July 9 2000</h3> 3262<ul> 3263 <li>fixed the spec the RPMs should be better</li> 3264 <li>fixed a serious bug in the FTP implementation, released 1.8.9 to solve 3265 rpmfind users problem</li> 3266</ul> 3267 3268<h3>2.1.1: July 1 2000</h3> 3269<ul> 3270 <li>fixes a couple of bugs in the 2.1.0 packaging</li> 3271 <li>improvements on the HTML parser</li> 3272</ul> 3273 3274<h3>2.1.0 and 1.8.8: June 29 2000</h3> 3275<ul> 3276 <li>1.8.8 is mostly a commodity package for upgrading to libxml2 according 3277 to <a href="upgrade.html">new instructions</a>. It fixes a nasty problem 3278 about &#38; charref parsing</li> 3279 <li>2.1.0 also ease the upgrade from libxml v1 to the recent version. it 3280 also contains numerous fixes and enhancements: 3281 <ul> 3282 <li>added xmlStopParser() to stop parsing</li> 3283 <li>improved a lot parsing speed when there is large CDATA blocs</li> 3284 <li>includes XPath patches provided by Picdar Technology</li> 3285 <li>tried to fix as much as possible DTD validation and namespace 3286 related problems</li> 3287 <li>output to a given encoding has been added/tested</li> 3288 <li>lot of various fixes</li> 3289 </ul> 3290 </li> 3291</ul> 3292 3293<h3>2.0.0: Apr 12 2000</h3> 3294<ul> 3295 <li>First public release of libxml2. If you are using libxml, it's a good 3296 idea to check the 1.x to 2.x upgrade instructions. NOTE: while initially 3297 scheduled for Apr 3 the release occurred only on Apr 12 due to massive 3298 workload.</li> 3299 <li>The include are now located under $prefix/include/libxml (instead of 3300 $prefix/include/gnome-xml), they also are referenced by 3301 <pre>#include <libxml/xxx.h></pre> 3302 <p>instead of</p> 3303 <pre>#include "xxx.h"</pre> 3304 </li> 3305 <li>a new URI module for parsing URIs and following strictly RFC 2396</li> 3306 <li>the memory allocation routines used by libxml can now be overloaded 3307 dynamically by using xmlMemSetup()</li> 3308 <li>The previously CVS only tool tester has been renamed 3309 <strong>xmllint</strong> and is now installed as part of the libxml2 3310 package</li> 3311 <li>The I/O interface has been revamped. There is now ways to plug in 3312 specific I/O modules, either at the URI scheme detection level using 3313 xmlRegisterInputCallbacks() or by passing I/O functions when creating a 3314 parser context using xmlCreateIOParserCtxt()</li> 3315 <li>there is a C preprocessor macro LIBXML_VERSION providing the version 3316 number of the libxml module in use</li> 3317 <li>a number of optional features of libxml can now be excluded at 3318 configure time (FTP/HTTP/HTML/XPath/Debug)</li> 3319</ul> 3320 3321<h3>2.0.0beta: Mar 14 2000</h3> 3322<ul> 3323 <li>This is a first Beta release of libxml version 2</li> 3324 <li>It's available only from<a href="ftp://xmlsoft.org/libxml2/">xmlsoft.org 3325 FTP</a>, it's packaged as libxml2-2.0.0beta and available as tar and 3326 RPMs</li> 3327 <li>This version is now the head in the Gnome CVS base, the old one is 3328 available under the tag LIB_XML_1_X</li> 3329 <li>This includes a very large set of changes. From a programmatic point 3330 of view applications should not have to be modified too much, check the 3331 <a href="upgrade.html">upgrade page</a></li> 3332 <li>Some interfaces may changes (especially a bit about encoding).</li> 3333 <li>the updates includes: 3334 <ul> 3335 <li>fix I18N support. ISO-Latin-x/UTF-8/UTF-16 (nearly) seems correctly 3336 handled now</li> 3337 <li>Better handling of entities, especially well-formedness checking 3338 and proper PEref extensions in external subsets</li> 3339 <li>DTD conditional sections</li> 3340 <li>Validation now correctly handle entities content</li> 3341 <li><a href="http://rpmfind.net/tools/gdome/messages/0039.html">change 3342 structures to accommodate DOM</a></li> 3343 </ul> 3344 </li> 3345 <li>Serious progress were made toward compliance, <a 3346 href="conf/result.html">here are the result of the test</a> against the 3347 OASIS testsuite (except the Japanese tests since I don't support that 3348 encoding yet). This URL is rebuilt every couple of hours using the CVS 3349 head version.</li> 3350</ul> 3351 3352<h3>1.8.7: Mar 6 2000</h3> 3353<ul> 3354 <li>This is a bug fix release:</li> 3355 <li>It is possible to disable the ignorable blanks heuristic used by 3356 libxml-1.x, a new function xmlKeepBlanksDefault(0) will allow this. Note 3357 that for adherence to XML spec, this behaviour will be disabled by 3358 default in 2.x . The same function will allow to keep compatibility for 3359 old code.</li> 3360 <li>Blanks in <a> </a> constructs are not ignored anymore, 3361 avoiding heuristic is really the Right Way :-\</li> 3362 <li>The unchecked use of snprintf which was breaking libxml-1.8.6 3363 compilation on some platforms has been fixed</li> 3364 <li>nanoftp.c nanohttp.c: Fixed '#' and '?' stripping when processing 3365 URIs</li> 3366</ul> 3367 3368<h3>1.8.6: Jan 31 2000</h3> 3369<ul> 3370 <li>added a nanoFTP transport module, debugged until the new version of <a 3371 href="http://rpmfind.net/linux/rpm2html/rpmfind.html">rpmfind</a> can use 3372 it without troubles</li> 3373</ul> 3374 3375<h3>1.8.5: Jan 21 2000</h3> 3376<ul> 3377 <li>adding APIs to parse a well balanced chunk of XML (production <a 3378 href="http://www.w3.org/TR/REC-xml#NT-content">[43] content</a> of the 3379 XML spec)</li> 3380 <li>fixed a hideous bug in xmlGetProp pointed by Rune.Djurhuus@fast.no</li> 3381 <li>Jody Goldberg <jgoldberg@home.com> provided another patch trying 3382 to solve the zlib checks problems</li> 3383 <li>The current state in gnome CVS base is expected to ship as 1.8.5 with 3384 gnumeric soon</li> 3385</ul> 3386 3387<h3>1.8.4: Jan 13 2000</h3> 3388<ul> 3389 <li>bug fixes, reintroduced xmlNewGlobalNs(), fixed xmlNewNs()</li> 3390 <li>all exit() call should have been removed from libxml</li> 3391 <li>fixed a problem with INCLUDE_WINSOCK on WIN32 platform</li> 3392 <li>added newDocFragment()</li> 3393</ul> 3394 3395<h3>1.8.3: Jan 5 2000</h3> 3396<ul> 3397 <li>a Push interface for the XML and HTML parsers</li> 3398 <li>a shell-like interface to the document tree (try tester --shell :-)</li> 3399 <li>lots of bug fixes and improvement added over XMas holidays</li> 3400 <li>fixed the DTD parsing code to work with the xhtml DTD</li> 3401 <li>added xmlRemoveProp(), xmlRemoveID() and xmlRemoveRef()</li> 3402 <li>Fixed bugs in xmlNewNs()</li> 3403 <li>External entity loading code has been revamped, now it uses 3404 xmlLoadExternalEntity(), some fix on entities processing were added</li> 3405 <li>cleaned up WIN32 includes of socket stuff</li> 3406</ul> 3407 3408<h3>1.8.2: Dec 21 1999</h3> 3409<ul> 3410 <li>I got another problem with includes and C++, I hope this issue is fixed 3411 for good this time</li> 3412 <li>Added a few tree modification functions: xmlReplaceNode, 3413 xmlAddPrevSibling, xmlAddNextSibling, xmlNodeSetName and 3414 xmlDocSetRootElement</li> 3415 <li>Tried to improve the HTML output with help from <a 3416 href="mailto:clahey@umich.edu">Chris Lahey</a></li> 3417</ul> 3418 3419<h3>1.8.1: Dec 18 1999</h3> 3420<ul> 3421 <li>various patches to avoid troubles when using libxml with C++ compilers 3422 the "namespace" keyword and C escaping in include files</li> 3423 <li>a problem in one of the core macros IS_CHAR was corrected</li> 3424 <li>fixed a bug introduced in 1.8.0 breaking default namespace processing, 3425 and more specifically the Dia application</li> 3426 <li>fixed a posteriori validation (validation after parsing, or by using a 3427 Dtd not specified in the original document)</li> 3428 <li>fixed a bug in</li> 3429</ul> 3430 3431<h3>1.8.0: Dec 12 1999</h3> 3432<ul> 3433 <li>cleanup, especially memory wise</li> 3434 <li>the parser should be more reliable, especially the HTML one, it should 3435 not crash, whatever the input !</li> 3436 <li>Integrated various patches, especially a speedup improvement for large 3437 dataset from <a href="mailto:cnygard@bellatlantic.net">Carl Nygard</a>, 3438 configure with --with-buffers to enable them.</li> 3439 <li>attribute normalization, oops should have been added long ago !</li> 3440 <li>attributes defaulted from DTDs should be available, xmlSetProp() now 3441 does entities escaping by default.</li> 3442</ul> 3443 3444<h3>1.7.4: Oct 25 1999</h3> 3445<ul> 3446 <li>Lots of HTML improvement</li> 3447 <li>Fixed some errors when saving both XML and HTML</li> 3448 <li>More examples, the regression tests should now look clean</li> 3449 <li>Fixed a bug with contiguous charref</li> 3450</ul> 3451 3452<h3>1.7.3: Sep 29 1999</h3> 3453<ul> 3454 <li>portability problems fixed</li> 3455 <li>snprintf was used unconditionally, leading to link problems on system 3456 were it's not available, fixed</li> 3457</ul> 3458 3459<h3>1.7.1: Sep 24 1999</h3> 3460<ul> 3461 <li>The basic type for strings manipulated by libxml has been renamed in 3462 1.7.1 from <strong>CHAR</strong> to <strong>xmlChar</strong>. The reason 3463 is that CHAR was conflicting with a predefined type on Windows. However 3464 on non WIN32 environment, compatibility is provided by the way of a 3465 <strong>#define </strong>.</li> 3466 <li>Changed another error : the use of a structure field called errno, and 3467 leading to troubles on platforms where it's a macro</li> 3468</ul> 3469 3470<h3>1.7.0: Sep 23 1999</h3> 3471<ul> 3472 <li>Added the ability to fetch remote DTD or parsed entities, see the <a 3473 href="html/libxml-nanohttp.html">nanohttp</a> module.</li> 3474 <li>Added an errno to report errors by another mean than a simple printf 3475 like callback</li> 3476 <li>Finished ID/IDREF support and checking when validation</li> 3477 <li>Serious memory leaks fixed (there is now a <a 3478 href="html/libxml-xmlmemory.html">memory wrapper</a> module)</li> 3479 <li>Improvement of <a href="http://www.w3.org/TR/xpath">XPath</a> 3480 implementation</li> 3481 <li>Added an HTML parser front-end</li> 3482</ul> 3483 3484<h2><a name="XML">XML</a></h2> 3485 3486<p><a href="http://www.w3.org/TR/REC-xml">XML is a standard</a> for 3487markup-based structured documents. Here is <a name="example">an example XML 3488document</a>:</p> 3489<pre><?xml version="1.0"?> 3490<EXAMPLE prop1="gnome is great" prop2="&amp; linux too"> 3491 <head> 3492 <title>Welcome to Gnome</title> 3493 </head> 3494 <chapter> 3495 <title>The Linux adventure</title> 3496 <p>bla bla bla ...</p> 3497 <image href="linus.gif"/> 3498 <p>...</p> 3499 </chapter> 3500</EXAMPLE></pre> 3501 3502<p>The first line specifies that it is an XML document and gives useful 3503information about its encoding. Then the rest of the document is a text 3504format whose structure is specified by tags between brackets. <strong>Each 3505tag opened has to be closed</strong>. XML is pedantic about this. However, if 3506a tag is empty (no content), a single tag can serve as both the opening and 3507closing tag if it ends with <code>/></code> rather than with 3508<code>></code>. Note that, for example, the image tag has no content (just 3509an attribute) and is closed by ending the tag with <code>/></code>.</p> 3510 3511<p>XML can be applied successfully to a wide range of tasks, ranging from 3512long term structured document maintenance (where it follows the steps of 3513SGML) to simple data encoding mechanisms like configuration file formatting 3514(glade), spreadsheets (gnumeric), or even shorter lived documents such as 3515WebDAV where it is used to encode remote calls between a client and a 3516server.</p> 3517 3518<h2><a name="XSLT">XSLT</a></h2> 3519 3520<p>Check <a href="http://xmlsoft.org/XSLT">the separate libxslt page</a></p> 3521 3522<p><a href="http://www.w3.org/TR/xslt">XSL Transformations</a>, is a 3523language for transforming XML documents into other XML documents (or 3524HTML/textual output).</p> 3525 3526<p>A separate library called libxslt is available implementing XSLT-1.0 for 3527libxml2. This module "libxslt" too can be found in the Gnome SVN base.</p> 3528 3529<p>You can check the progresses on the libxslt <a 3530href="http://xmlsoft.org/XSLT/ChangeLog.html">Changelog</a>.</p> 3531 3532<h2><a name="Python">Python and bindings</a></h2> 3533 3534<p>There are a number of language bindings and wrappers available for 3535libxml2, the list below is not exhaustive. Please contact the <a 3536href="http://mail.gnome.org/mailman/listinfo/xml-bindings">xml-bindings@gnome.org</a> 3537(<a href="http://mail.gnome.org/archives/xml-bindings/">archives</a>) in 3538order to get updates to this list or to discuss the specific topic of libxml2 3539or libxslt wrappers or bindings:</p> 3540<ul> 3541 <li><a href="http://libxmlplusplus.sourceforge.net/">Libxml++</a> seems the 3542 most up-to-date C++ bindings for libxml2, check the <a 3543 href="http://libxmlplusplus.sourceforge.net/reference/html/hierarchy.html">documentation</a> 3544 and the <a 3545 href="http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/libxmlplusplus/libxml%2b%2b/examples/">examples</a>.</li> 3546 <li>There is another <a href="http://libgdome-cpp.berlios.de/">C++ wrapper 3547 based on the gdome2 bindings</a> maintained by Tobias Peters.</li> 3548 <li>and a third C++ wrapper by Peter Jones <pjones@pmade.org> 3549 <p>Website: <a 3550 href="http://pmade.org/pjones/software/xmlwrapp/">http://pmade.org/pjones/software/xmlwrapp/</a></p> 3551 </li> 3552 <li>XML::LibXML <a href="http://cpan.uwinnipeg.ca/dist/XML-LibXML">Perl 3553 bindings</a> are available on CPAN, as well as XML::LibXSLT 3554 <a href="http://cpan.uwinnipeg.ca/dist/XML-LibXSLT">Perl libxslt 3555 bindings</a>.</li> 3556 <li>If you're interested into scripting XML processing, have a look at <a 3557 href="http://xsh.sourceforge.net/">XSH</a> an XML editing shell based on 3558 Libxml2 Perl bindings.</li> 3559 <li><a href="mailto:dkuhlman@cutter.rexx.com">Dave Kuhlman</a> provides an 3560 earlier version of the libxml/libxslt <a 3561 href="http://www.rexx.com/~dkuhlman">wrappers for Python</a>.</li> 3562 <li>Gopal.V and Peter Minten develop <a 3563 href="http://savannah.gnu.org/projects/libxmlsharp">libxml#</a>, a set of 3564 C# libxml2 bindings.</li> 3565 <li>Petr Kozelka provides <a 3566 href="http://sourceforge.net/projects/libxml2-pas">Pascal units to glue 3567 libxml2</a> with Kylix, Delphi and other Pascal compilers.</li> 3568 <li>Uwe Fechner also provides <a 3569 href="http://sourceforge.net/projects/idom2-pas/">idom2</a>, a DOM2 3570 implementation for Kylix2/D5/D6 from Borland.</li> 3571 <li>There is <a href="http://libxml.rubyforge.org/">bindings for Ruby</a> 3572 and libxml2 bindings are also available in Ruby through the <a 3573 href="http://libgdome-ruby.berlios.de/">libgdome-ruby</a> module 3574 maintained by Tobias Peters.</li> 3575 <li>Steve Ball and contributors maintains <a 3576 href="http://tclxml.sourceforge.net/">libxml2 and libxslt bindings for 3577 Tcl</a>.</li> 3578 <li>libxml2 and libxslt are the default XML libraries for PHP5.</li> 3579 <li><a href="http://savannah.gnu.org/projects/classpathx/">LibxmlJ</a> is 3580 an effort to create a 100% JAXP-compatible Java wrapper for libxml2 and 3581 libxslt as part of GNU ClasspathX project.</li> 3582 <li>Patrick McPhee provides Rexx bindings fof libxml2 and libxslt, look for 3583 <a href="http://www.interlog.com/~ptjm/software.html">RexxXML</a>.</li> 3584 <li><a 3585 href="http://www.satimage.fr/software/en/xml_suite.html">Satimage</a> 3586 provides <a 3587 href="http://www.satimage.fr/software/en/downloads_osaxen.html">XMLLib 3588 osax</a>. This is an osax for Mac OS X with a set of commands to 3589 implement in AppleScript the XML DOM, XPATH and XSLT. Also includes 3590 commands for Property-lists (Apple's fast lookup table XML format.)</li> 3591 <li>Francesco Montorsi developped <a 3592 href="https://sourceforge.net/project/showfiles.php?group_id=51305&package_id=45182">wxXml2</a> 3593 wrappers that interface libxml2, allowing wxWidgets applications to 3594 load/save/edit XML instances.</li> 3595</ul> 3596 3597<p>The distribution includes a set of Python bindings, which are guaranteed 3598to be maintained as part of the library in the future, though the Python 3599interface have not yet reached the completeness of the C API.</p> 3600 3601<p>Note that some of the Python purist dislike the default set of Python 3602bindings, rather than complaining I suggest they have a look at <a 3603href="http://lxml.de/">lxml the more pythonic bindings for libxml2 3604and libxslt</a> and <a 3605href="http://lxml.de/mailinglist/">check the mailing-list</a>.</p> 3606 3607<p><a href="mailto:stephane.bidoul@softwareag.com">Stéphane Bidoul</a> 3608maintains <a href="http://users.skynet.be/sbi/libxml-python/">a Windows port 3609of the Python bindings</a>.</p> 3610 3611<p>Note to people interested in building bindings, the API is formalized as 3612<a href="libxml2-api.xml">an XML API description file</a> which allows to 3613automate a large part of the Python bindings, this includes function 3614descriptions, enums, structures, typedefs, etc... The Python script used to 3615build the bindings is python/generator.py in the source distribution.</p> 3616 3617<p>To install the Python bindings there are 2 options:</p> 3618<ul> 3619 <li>If you use an RPM based distribution, simply install the <a 3620 href="http://rpmfind.net/linux/rpm2html/search.php?query=libxml2-python">libxml2-python 3621 RPM</a> (and if needed the <a 3622 href="http://rpmfind.net/linux/rpm2html/search.php?query=libxslt-python">libxslt-python 3623 RPM</a>).</li> 3624 <li>Otherwise use the <a href="ftp://xmlsoft.org/libxml2/python/">libxml2-python 3625 module distribution</a> corresponding to your installed version of 3626 libxml2 and libxslt. Note that to install it you will need both libxml2 3627 and libxslt installed and run "python setup.py build install" in the 3628 module tree.</li> 3629</ul> 3630 3631<p>The distribution includes a set of examples and regression tests for the 3632python bindings in the <code>python/tests</code> directory. Here are some 3633excerpts from those tests:</p> 3634 3635<h3>tst.py:</h3> 3636 3637<p>This is a basic test of the file interface and DOM navigation:</p> 3638<pre>import libxml2, sys 3639 3640doc = libxml2.parseFile("tst.xml") 3641if doc.name != "tst.xml": 3642 print "doc.name failed" 3643 sys.exit(1) 3644root = doc.children 3645if root.name != "doc": 3646 print "root.name failed" 3647 sys.exit(1) 3648child = root.children 3649if child.name != "foo": 3650 print "child.name failed" 3651 sys.exit(1) 3652doc.freeDoc()</pre> 3653 3654<p>The Python module is called libxml2; parseFile is the equivalent of 3655xmlParseFile (most of the bindings are automatically generated, and the xml 3656prefix is removed and the casing convention are kept). All node seen at the 3657binding level share the same subset of accessors:</p> 3658<ul> 3659 <li><code>name</code> : returns the node name</li> 3660 <li><code>type</code> : returns a string indicating the node type</li> 3661 <li><code>content</code> : returns the content of the node, it is based on 3662 xmlNodeGetContent() and hence is recursive.</li> 3663 <li><code>parent</code> , <code>children</code>, <code>last</code>, 3664 <code>next</code>, <code>prev</code>, <code>doc</code>, 3665 <code>properties</code>: pointing to the associated element in the tree, 3666 those may return None in case no such link exists.</li> 3667</ul> 3668 3669<p>Also note the need to explicitly deallocate documents with freeDoc() . 3670Reference counting for libxml2 trees would need quite a lot of work to 3671function properly, and rather than risk memory leaks if not implemented 3672correctly it sounds safer to have an explicit function to free a tree. The 3673wrapper python objects like doc, root or child are them automatically garbage 3674collected.</p> 3675 3676<h3>validate.py:</h3> 3677 3678<p>This test check the validation interfaces and redirection of error 3679messages:</p> 3680<pre>import libxml2 3681 3682#deactivate error messages from the validation 3683def noerr(ctx, str): 3684 pass 3685 3686libxml2.registerErrorHandler(noerr, None) 3687 3688ctxt = libxml2.createFileParserCtxt("invalid.xml") 3689ctxt.validate(1) 3690ctxt.parseDocument() 3691doc = ctxt.doc() 3692valid = ctxt.isValid() 3693doc.freeDoc() 3694if valid != 0: 3695 print "validity check failed"</pre> 3696 3697<p>The first thing to notice is the call to registerErrorHandler(), it 3698defines a new error handler global to the library. It is used to avoid seeing 3699the error messages when trying to validate the invalid document.</p> 3700 3701<p>The main interest of that test is the creation of a parser context with 3702createFileParserCtxt() and how the behaviour can be changed before calling 3703parseDocument() . Similarly the information resulting from the parsing phase 3704is also available using context methods.</p> 3705 3706<p>Contexts like nodes are defined as class and the libxml2 wrappers maps the 3707C function interfaces in terms of objects method as much as possible. The 3708best to get a complete view of what methods are supported is to look at the 3709libxml2.py module containing all the wrappers.</p> 3710 3711<h3>push.py:</h3> 3712 3713<p>This test show how to activate the push parser interface:</p> 3714<pre>import libxml2 3715 3716ctxt = libxml2.createPushParser(None, "<foo", 4, "test.xml") 3717ctxt.parseChunk("/>", 2, 1) 3718doc = ctxt.doc() 3719 3720doc.freeDoc()</pre> 3721 3722<p>The context is created with a special call based on the 3723xmlCreatePushParser() from the C library. The first argument is an optional 3724SAX callback object, then the initial set of data, the length and the name of 3725the resource in case URI-References need to be computed by the parser.</p> 3726 3727<p>Then the data are pushed using the parseChunk() method, the last call 3728setting the third argument terminate to 1.</p> 3729 3730<h3>pushSAX.py:</h3> 3731 3732<p>this test show the use of the event based parsing interfaces. In this case 3733the parser does not build a document, but provides callback information as 3734the parser makes progresses analyzing the data being provided:</p> 3735<pre>import libxml2 3736log = "" 3737 3738class callback: 3739 def startDocument(self): 3740 global log 3741 log = log + "startDocument:" 3742 3743 def endDocument(self): 3744 global log 3745 log = log + "endDocument:" 3746 3747 def startElement(self, tag, attrs): 3748 global log 3749 log = log + "startElement %s %s:" % (tag, attrs) 3750 3751 def endElement(self, tag): 3752 global log 3753 log = log + "endElement %s:" % (tag) 3754 3755 def characters(self, data): 3756 global log 3757 log = log + "characters: %s:" % (data) 3758 3759 def warning(self, msg): 3760 global log 3761 log = log + "warning: %s:" % (msg) 3762 3763 def error(self, msg): 3764 global log 3765 log = log + "error: %s:" % (msg) 3766 3767 def fatalError(self, msg): 3768 global log 3769 log = log + "fatalError: %s:" % (msg) 3770 3771handler = callback() 3772 3773ctxt = libxml2.createPushParser(handler, "<foo", 4, "test.xml") 3774chunk = " url='tst'>b" 3775ctxt.parseChunk(chunk, len(chunk), 0) 3776chunk = "ar</foo>" 3777ctxt.parseChunk(chunk, len(chunk), 1) 3778 3779reference = "startDocument:startElement foo {'url': 'tst'}:" + \ 3780 "characters: bar:endElement foo:endDocument:" 3781if log != reference: 3782 print "Error got: %s" % log 3783 print "Expected: %s" % reference</pre> 3784 3785<p>The key object in that test is the handler, it provides a number of entry 3786points which can be called by the parser as it makes progresses to indicate 3787the information set obtained. The full set of callback is larger than what 3788the callback class in that specific example implements (see the SAX 3789definition for a complete list). The wrapper will only call those supplied by 3790the object when activated. The startElement receives the names of the element 3791and a dictionary containing the attributes carried by this element.</p> 3792 3793<p>Also note that the reference string generated from the callback shows a 3794single character call even though the string "bar" is passed to the parser 3795from 2 different call to parseChunk()</p> 3796 3797<h3>xpath.py:</h3> 3798 3799<p>This is a basic test of XPath wrappers support</p> 3800<pre>import libxml2 3801 3802doc = libxml2.parseFile("tst.xml") 3803ctxt = doc.xpathNewContext() 3804res = ctxt.xpathEval("//*") 3805if len(res) != 2: 3806 print "xpath query: wrong node set size" 3807 sys.exit(1) 3808if res[0].name != "doc" or res[1].name != "foo": 3809 print "xpath query: wrong node set value" 3810 sys.exit(1) 3811doc.freeDoc() 3812ctxt.xpathFreeContext()</pre> 3813 3814<p>This test parses a file, then create an XPath context to evaluate XPath 3815expression on it. The xpathEval() method execute an XPath query and returns 3816the result mapped in a Python way. String and numbers are natively converted, 3817and node sets are returned as a tuple of libxml2 Python nodes wrappers. Like 3818the document, the XPath context need to be freed explicitly, also not that 3819the result of the XPath query may point back to the document tree and hence 3820the document must be freed after the result of the query is used.</p> 3821 3822<h3>xpathext.py:</h3> 3823 3824<p>This test shows how to extend the XPath engine with functions written in 3825python:</p> 3826<pre>import libxml2 3827 3828def foo(ctx, x): 3829 return x + 1 3830 3831doc = libxml2.parseFile("tst.xml") 3832ctxt = doc.xpathNewContext() 3833libxml2.registerXPathFunction(ctxt._o, "foo", None, foo) 3834res = ctxt.xpathEval("foo(1)") 3835if res != 2: 3836 print "xpath extension failure" 3837doc.freeDoc() 3838ctxt.xpathFreeContext()</pre> 3839 3840<p>Note how the extension function is registered with the context (but that 3841part is not yet finalized, this may change slightly in the future).</p> 3842 3843<h3>tstxpath.py:</h3> 3844 3845<p>This test is similar to the previous one but shows how the extension 3846function can access the XPath evaluation context:</p> 3847<pre>def foo(ctx, x): 3848 global called 3849 3850 # 3851 # test that access to the XPath evaluation contexts 3852 # 3853 pctxt = libxml2.xpathParserContext(_obj=ctx) 3854 ctxt = pctxt.context() 3855 called = ctxt.function() 3856 return x + 1</pre> 3857 3858<p>All the interfaces around the XPath parser(or rather evaluation) context 3859are not finalized, but it should be sufficient to do contextual work at the 3860evaluation point.</p> 3861 3862<h3>Memory debugging:</h3> 3863 3864<p>last but not least, all tests starts with the following prologue:</p> 3865<pre>#memory debug specific 3866libxml2.debugMemory(1)</pre> 3867 3868<p>and ends with the following epilogue:</p> 3869<pre>#memory debug specific 3870libxml2.cleanupParser() 3871if libxml2.debugMemory(1) == 0: 3872 print "OK" 3873else: 3874 print "Memory leak %d bytes" % (libxml2.debugMemory(1)) 3875 libxml2.dumpMemory()</pre> 3876 3877<p>Those activate the memory debugging interface of libxml2 where all 3878allocated block in the library are tracked. The prologue then cleans up the 3879library state and checks that all allocated memory has been freed. If not it 3880calls dumpMemory() which saves that list in a <code>.memdump</code> file.</p> 3881 3882<h2><a name="architecture">libxml2 architecture</a></h2> 3883 3884<p>Libxml2 is made of multiple components; some of them are optional, and 3885most of the block interfaces are public. The main components are:</p> 3886<ul> 3887 <li>an Input/Output layer</li> 3888 <li>FTP and HTTP client layers (optional)</li> 3889 <li>an Internationalization layer managing the encodings support</li> 3890 <li>a URI module</li> 3891 <li>the XML parser and its basic SAX interface</li> 3892 <li>an HTML parser using the same SAX interface (optional)</li> 3893 <li>a SAX tree module to build an in-memory DOM representation</li> 3894 <li>a tree module to manipulate the DOM representation</li> 3895 <li>a validation module using the DOM representation (optional)</li> 3896 <li>an XPath module for global lookup in a DOM representation 3897 (optional)</li> 3898 <li>a debug module (optional)</li> 3899</ul> 3900 3901<p>Graphically this gives the following:</p> 3902 3903<p><img src="libxml.gif" alt="a graphical view of the various"></p> 3904 3905<p></p> 3906 3907<h2><a name="tree">The tree output</a></h2> 3908 3909<p>The parser returns a tree built during the document analysis. The value 3910returned is an <strong>xmlDocPtr</strong> (i.e., a pointer to an 3911<strong>xmlDoc</strong> structure). This structure contains information such 3912as the file name, the document type, and a <strong>children</strong> pointer 3913which is the root of the document (or more exactly the first child under the 3914root which is the document). The tree is made of <strong>xmlNode</strong>s, 3915chained in double-linked lists of siblings and with a children<->parent 3916relationship. An xmlNode can also carry properties (a chain of xmlAttr 3917structures). An attribute may have a value which is a list of TEXT or 3918ENTITY_REF nodes.</p> 3919 3920<p>Here is an example (erroneous with respect to the XML spec since there 3921should be only one ELEMENT under the root):</p> 3922 3923<p><img src="structure.gif" alt=" structure.gif "></p> 3924 3925<p>In the source package there is a small program (not installed by default) 3926called <strong>xmllint</strong> which parses XML files given as argument and 3927prints them back as parsed. This is useful for detecting errors both in XML 3928code and in the XML parser itself. It has an option <strong>--debug</strong> 3929which prints the actual in-memory structure of the document; here is the 3930result with the <a href="#example">example</a> given before:</p> 3931<pre>DOCUMENT 3932version=1.0 3933standalone=true 3934 ELEMENT EXAMPLE 3935 ATTRIBUTE prop1 3936 TEXT 3937 content=gnome is great 3938 ATTRIBUTE prop2 3939 ENTITY_REF 3940 TEXT 3941 content= linux too 3942 ELEMENT head 3943 ELEMENT title 3944 TEXT 3945 content=Welcome to Gnome 3946 ELEMENT chapter 3947 ELEMENT title 3948 TEXT 3949 content=The Linux adventure 3950 ELEMENT p 3951 TEXT 3952 content=bla bla bla ... 3953 ELEMENT image 3954 ATTRIBUTE href 3955 TEXT 3956 content=linus.gif 3957 ELEMENT p 3958 TEXT 3959 content=...</pre> 3960 3961<p>This should be useful for learning the internal representation model.</p> 3962 3963<h2><a name="interface">The SAX interface</a></h2> 3964 3965<p>Sometimes the DOM tree output is just too large to fit reasonably into 3966memory. In that case (and if you don't expect to save back the XML document 3967loaded using libxml), it's better to use the SAX interface of libxml. SAX is 3968a <strong>callback-based interface</strong> to the parser. Before parsing, 3969the application layer registers a customized set of callbacks which are 3970called by the library as it progresses through the XML input.</p> 3971 3972<p>To get more detailed step-by-step guidance on using the SAX interface of 3973libxml, see the <a 3974href="http://www.jamesh.id.au/articles/libxml-sax/libxml-sax.html">nice 3975documentation</a>.written by <a href="mailto:james@daa.com.au">James 3976Henstridge</a>.</p> 3977 3978<p>You can debug the SAX behaviour by using the <strong>testSAX</strong> 3979program located in the gnome-xml module (it's usually not shipped in the 3980binary packages of libxml, but you can find it in the tar source 3981distribution). Here is the sequence of callbacks that would be reported by 3982testSAX when parsing the example XML document shown earlier:</p> 3983<pre>SAX.setDocumentLocator() 3984SAX.startDocument() 3985SAX.getEntity(amp) 3986SAX.startElement(EXAMPLE, prop1='gnome is great', prop2='&amp; linux too') 3987SAX.characters( , 3) 3988SAX.startElement(head) 3989SAX.characters( , 4) 3990SAX.startElement(title) 3991SAX.characters(Welcome to Gnome, 16) 3992SAX.endElement(title) 3993SAX.characters( , 3) 3994SAX.endElement(head) 3995SAX.characters( , 3) 3996SAX.startElement(chapter) 3997SAX.characters( , 4) 3998SAX.startElement(title) 3999SAX.characters(The Linux adventure, 19) 4000SAX.endElement(title) 4001SAX.characters( , 4) 4002SAX.startElement(p) 4003SAX.characters(bla bla bla ..., 15) 4004SAX.endElement(p) 4005SAX.characters( , 4) 4006SAX.startElement(image, href='linus.gif') 4007SAX.endElement(image) 4008SAX.characters( , 4) 4009SAX.startElement(p) 4010SAX.characters(..., 3) 4011SAX.endElement(p) 4012SAX.characters( , 3) 4013SAX.endElement(chapter) 4014SAX.characters( , 1) 4015SAX.endElement(EXAMPLE) 4016SAX.endDocument()</pre> 4017 4018<p>Most of the other interfaces of libxml2 are based on the DOM tree-building 4019facility, so nearly everything up to the end of this document presupposes the 4020use of the standard DOM tree build. Note that the DOM tree itself is built by 4021a set of registered default callbacks, without internal specific 4022interface.</p> 4023 4024<h2><a name="Validation">Validation & DTDs</a></h2> 4025 4026<p>Table of Content:</p> 4027<ol> 4028 <li><a href="#General5">General overview</a></li> 4029 <li><a href="#definition">The definition</a></li> 4030 <li><a href="#Simple">Simple rules</a> 4031 <ol> 4032 <li><a href="#reference">How to reference a DTD from a document</a></li> 4033 <li><a href="#Declaring">Declaring elements</a></li> 4034 <li><a href="#Declaring1">Declaring attributes</a></li> 4035 </ol> 4036 </li> 4037 <li><a href="#Some">Some examples</a></li> 4038 <li><a href="#validate">How to validate</a></li> 4039 <li><a href="#Other">Other resources</a></li> 4040</ol> 4041 4042<h3><a name="General5">General overview</a></h3> 4043 4044<p>Well what is validation and what is a DTD ?</p> 4045 4046<p>DTD is the acronym for Document Type Definition. This is a description of 4047the content for a family of XML files. This is part of the XML 1.0 4048specification, and allows one to describe and verify that a given document 4049instance conforms to the set of rules detailing its structure and content.</p> 4050 4051<p>Validation is the process of checking a document against a DTD (more 4052generally against a set of construction rules).</p> 4053 4054<p>The validation process and building DTDs are the two most difficult parts 4055of the XML life cycle. Briefly a DTD defines all the possible elements to be 4056found within your document, what is the formal shape of your document tree 4057(by defining the allowed content of an element; either text, a regular 4058expression for the allowed list of children, or mixed content i.e. both text 4059and children). The DTD also defines the valid attributes for all elements and 4060the types of those attributes.</p> 4061 4062<h3><a name="definition1">The definition</a></h3> 4063 4064<p>The <a href="http://www.w3.org/TR/REC-xml">W3C XML Recommendation</a> (<a 4065href="http://www.xml.com/axml/axml.html">Tim Bray's annotated version of 4066Rev1</a>):</p> 4067<ul> 4068 <li><a href="http://www.w3.org/TR/REC-xml#elemdecls">Declaring 4069 elements</a></li> 4070 <li><a href="http://www.w3.org/TR/REC-xml#attdecls">Declaring 4071 attributes</a></li> 4072</ul> 4073 4074<p>(unfortunately) all this is inherited from the SGML world, the syntax is 4075ancient...</p> 4076 4077<h3><a name="Simple1">Simple rules</a></h3> 4078 4079<p>Writing DTDs can be done in many ways. The rules to build them if you need 4080something permanent or something which can evolve over time can be radically 4081different. Really complex DTDs like DocBook ones are flexible but quite 4082harder to design. I will just focus on DTDs for a formats with a fixed simple 4083structure. It is just a set of basic rules, and definitely not exhaustive nor 4084usable for complex DTD design.</p> 4085 4086<h4><a name="reference1">How to reference a DTD from a document</a>:</h4> 4087 4088<p>Assuming the top element of the document is <code>spec</code> and the dtd 4089is placed in the file <code>mydtd</code> in the subdirectory 4090<code>dtds</code> of the directory from where the document were loaded:</p> 4091 4092<p><code><!DOCTYPE spec SYSTEM "dtds/mydtd"></code></p> 4093 4094<p>Notes:</p> 4095<ul> 4096 <li>The system string is actually an URI-Reference (as defined in <a 4097 href="http://www.ietf.org/rfc/rfc2396.txt">RFC 2396</a>) so you can use a 4098 full URL string indicating the location of your DTD on the Web. This is a 4099 really good thing to do if you want others to validate your document.</li> 4100 <li>It is also possible to associate a <code>PUBLIC</code> identifier (a 4101 magic string) so that the DTD is looked up in catalogs on the client side 4102 without having to locate it on the web.</li> 4103 <li>A DTD contains a set of element and attribute declarations, but they 4104 don't define what the root of the document should be. This is explicitly 4105 told to the parser/validator as the first element of the 4106 <code>DOCTYPE</code> declaration.</li> 4107</ul> 4108 4109<h4><a name="Declaring2">Declaring elements</a>:</h4> 4110 4111<p>The following declares an element <code>spec</code>:</p> 4112 4113<p><code><!ELEMENT spec (front, body, back?)></code></p> 4114 4115<p>It also expresses that the spec element contains one <code>front</code>, 4116one <code>body</code> and one optional <code>back</code> children elements in 4117this order. The declaration of one element of the structure and its content 4118are done in a single declaration. Similarly the following declares 4119<code>div1</code> elements:</p> 4120 4121<p><code><!ELEMENT div1 (head, (p | list | note)*, div2?)></code></p> 4122 4123<p>which means div1 contains one <code>head</code> then a series of optional 4124<code>p</code>, <code>list</code>s and <code>note</code>s and then an 4125optional <code>div2</code>. And last but not least an element can contain 4126text:</p> 4127 4128<p><code><!ELEMENT b (#PCDATA)></code></p> 4129 4130<p><code>b</code> contains text or being of mixed content (text and elements 4131in no particular order):</p> 4132 4133<p><code><!ELEMENT p (#PCDATA|a|ul|b|i|em)*></code></p> 4134 4135<p><code>p </code>can contain text or <code>a</code>, <code>ul</code>, 4136<code>b</code>, <code>i </code>or <code>em</code> elements in no particular 4137order.</p> 4138 4139<h4><a name="Declaring1">Declaring attributes</a>:</h4> 4140 4141<p>Again the attributes declaration includes their content definition:</p> 4142 4143<p><code><!ATTLIST termdef name CDATA #IMPLIED></code></p> 4144 4145<p>means that the element <code>termdef</code> can have a <code>name</code> 4146attribute containing text (<code>CDATA</code>) and which is optional 4147(<code>#IMPLIED</code>). The attribute value can also be defined within a 4148set:</p> 4149 4150<p><code><!ATTLIST list type (bullets|ordered|glossary) 4151"ordered"></code></p> 4152 4153<p>means <code>list</code> element have a <code>type</code> attribute with 3 4154allowed values "bullets", "ordered" or "glossary" and which default to 4155"ordered" if the attribute is not explicitly specified.</p> 4156 4157<p>The content type of an attribute can be text (<code>CDATA</code>), 4158anchor/reference/references 4159(<code>ID</code>/<code>IDREF</code>/<code>IDREFS</code>), entity(ies) 4160(<code>ENTITY</code>/<code>ENTITIES</code>) or name(s) 4161(<code>NMTOKEN</code>/<code>NMTOKENS</code>). The following defines that a 4162<code>chapter</code> element can have an optional <code>id</code> attribute 4163of type <code>ID</code>, usable for reference from attribute of type 4164IDREF:</p> 4165 4166<p><code><!ATTLIST chapter id ID #IMPLIED></code></p> 4167 4168<p>The last value of an attribute definition can be <code>#REQUIRED 4169</code>meaning that the attribute has to be given, <code>#IMPLIED</code> 4170meaning that it is optional, or the default value (possibly prefixed by 4171<code>#FIXED</code> if it is the only allowed).</p> 4172 4173<p>Notes:</p> 4174<ul> 4175 <li>Usually the attributes pertaining to a given element are declared in a 4176 single expression, but it is just a convention adopted by a lot of DTD 4177 writers: 4178 <pre><!ATTLIST termdef 4179 id ID #REQUIRED 4180 name CDATA #IMPLIED></pre> 4181 <p>The previous construct defines both <code>id</code> and 4182 <code>name</code> attributes for the element <code>termdef</code>.</p> 4183 </li> 4184</ul> 4185 4186<h3><a name="Some1">Some examples</a></h3> 4187 4188<p>The directory <code>test/valid/dtds/</code> in the libxml2 distribution 4189contains some complex DTD examples. The example in the file 4190<code>test/valid/dia.xml</code> shows an XML file where the simple DTD is 4191directly included within the document.</p> 4192 4193<h3><a name="validate1">How to validate</a></h3> 4194 4195<p>The simplest way is to use the xmllint program included with libxml. The 4196<code>--valid</code> option turns-on validation of the files given as input. 4197For example the following validates a copy of the first revision of the XML 41981.0 specification:</p> 4199 4200<p><code>xmllint --valid --noout test/valid/REC-xml-19980210.xml</code></p> 4201 4202<p>the -- noout is used to disable output of the resulting tree.</p> 4203 4204<p>The <code>--dtdvalid dtd</code> allows validation of the document(s) 4205against a given DTD.</p> 4206 4207<p>Libxml2 exports an API to handle DTDs and validation, check the <a 4208href="http://xmlsoft.org/html/libxml-valid.html">associated 4209description</a>.</p> 4210 4211<h3><a name="Other1">Other resources</a></h3> 4212 4213<p>DTDs are as old as SGML. So there may be a number of examples on-line, I 4214will just list one for now, others pointers welcome:</p> 4215<ul> 4216 <li><a href="http://www.xml101.com:8081/dtd/">XML-101 DTD</a></li> 4217</ul> 4218 4219<p>I suggest looking at the examples found under test/valid/dtd and any of 4220the large number of books available on XML. The dia example in test/valid 4221should be both simple and complete enough to allow you to build your own.</p> 4222 4223<p></p> 4224 4225<h2><a name="Memory">Memory Management</a></h2> 4226 4227<p>Table of Content:</p> 4228<ol> 4229 <li><a href="#General3">General overview</a></li> 4230 <li><a href="#setting">Setting libxml2 set of memory routines</a></li> 4231 <li><a href="#cleanup">Cleaning up after using the library</a></li> 4232 <li><a href="#Debugging">Debugging routines</a></li> 4233 <li><a href="#General4">General memory requirements</a></li> 4234 <li><a href="#Compacting">Returning memory to the kernel</a></li> 4235</ol> 4236 4237<h3><a name="General3">General overview</a></h3> 4238 4239<p>The module <code><a 4240href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlmemory.h</a></code> 4241provides the interfaces to the libxml2 memory system:</p> 4242<ul> 4243 <li>libxml2 does not use the libc memory allocator directly but xmlFree(), 4244 xmlMalloc() and xmlRealloc()</li> 4245 <li>those routines can be reallocated to a specific set of routine, by 4246 default the libc ones i.e. free(), malloc() and realloc()</li> 4247 <li>the xmlmemory.c module includes a set of debugging routine</li> 4248</ul> 4249 4250<h3><a name="setting">Setting libxml2 set of memory routines</a></h3> 4251 4252<p>It is sometimes useful to not use the default memory allocator, either for 4253debugging, analysis or to implement a specific behaviour on memory management 4254(like on embedded systems). Two function calls are available to do so:</p> 4255<ul> 4256 <li><a href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMemGet 4257 ()</a> which return the current set of functions in use by the parser</li> 4258 <li><a 4259 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMemSetup()</a> 4260 which allow to set up a new set of memory allocation functions</li> 4261</ul> 4262 4263<p>Of course a call to xmlMemSetup() should probably be done before calling 4264any other libxml2 routines (unless you are sure your allocations routines are 4265compatibles).</p> 4266 4267<h3><a name="cleanup">Cleaning up after using the library</a></h3> 4268 4269<p>Libxml2 is not stateless, there is a few set of memory structures needing 4270allocation before the parser is fully functional (some encoding structures 4271for example). This also mean that once parsing is finished there is a tiny 4272amount of memory (a few hundred bytes) which can be recollected if you don't 4273reuse the library or any document built with it:</p> 4274<ul> 4275 <li><a href="http://xmlsoft.org/html/libxml-parser.html">xmlCleanupParser 4276 ()</a> is a centralized routine to free the library state and data. Note 4277 that it won't deallocate any produced tree if any (use the xmlFreeDoc() 4278 and related routines for this). This should be called only when the library 4279 is not used anymore.</li> 4280 <li><a href="http://xmlsoft.org/html/libxml-parser.html">xmlInitParser 4281 ()</a> is the dual routine allowing to preallocate the parsing state 4282 which can be useful for example to avoid initialization reentrancy 4283 problems when using libxml2 in multithreaded applications</li> 4284</ul> 4285 4286<p>Generally xmlCleanupParser() is safe assuming no parsing is ongoing and 4287no document is still being used, if needed the state will be rebuild at the 4288next invocation of parser routines (or by xmlInitParser()), but be careful 4289of the consequences in multithreaded applications.</p> 4290 4291<h3><a name="Debugging">Debugging routines</a></h3> 4292 4293<p>When configured using --with-mem-debug flag (off by default), libxml2 uses 4294a set of memory allocation debugging routines keeping track of all allocated 4295blocks and the location in the code where the routine was called. A couple of 4296other debugging routines allow to dump the memory allocated infos to a file 4297or call a specific routine when a given block number is allocated:</p> 4298<ul> 4299 <li><a 4300 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMallocLoc()</a> 4301 <a 4302 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlReallocLoc()</a> 4303 and <a 4304 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMemStrdupLoc()</a> 4305 are the memory debugging replacement allocation routines</li> 4306 <li><a href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMemoryDump 4307 ()</a> dumps all the information about the allocated memory block lefts 4308 in the <code>.memdump</code> file</li> 4309</ul> 4310 4311<p>When developing libxml2 memory debug is enabled, the tests programs call 4312xmlMemoryDump () and the "make test" regression tests will check for any 4313memory leak during the full regression test sequence, this helps a lot 4314ensuring that libxml2 does not leak memory and bullet proof memory 4315allocations use (some libc implementations are known to be far too permissive 4316resulting in major portability problems!).</p> 4317 4318<p>If the .memdump reports a leak, it displays the allocation function and 4319also tries to give some information about the content and structure of the 4320allocated blocks left. This is sufficient in most cases to find the culprit, 4321but not always. Assuming the allocation problem is reproducible, it is 4322possible to find more easily:</p> 4323<ol> 4324 <li>write down the block number xxxx not allocated</li> 4325 <li>export the environment variable XML_MEM_BREAKPOINT=xxxx , the easiest 4326 when using GDB is to simply give the command 4327 <p><code>set environment XML_MEM_BREAKPOINT xxxx</code></p> 4328 <p>before running the program.</p> 4329 </li> 4330 <li>run the program under a debugger and set a breakpoint on 4331 xmlMallocBreakpoint() a specific function called when this precise block 4332 is allocated</li> 4333 <li>when the breakpoint is reached you can then do a fine analysis of the 4334 allocation an step to see the condition resulting in the missing 4335 deallocation.</li> 4336</ol> 4337 4338<p>I used to use a commercial tool to debug libxml2 memory problems but after 4339noticing that it was not detecting memory leaks that simple mechanism was 4340used and proved extremely efficient until now. Lately I have also used <a 4341href="http://developer.kde.org/~sewardj/">valgrind</a> with quite some 4342success, it is tied to the i386 architecture since it works by emulating the 4343processor and instruction set, it is slow but extremely efficient, i.e. it 4344spot memory usage errors in a very precise way.</p> 4345 4346<h3><a name="General4">General memory requirements</a></h3> 4347 4348<p>How much libxml2 memory require ? It's hard to tell in average it depends 4349of a number of things:</p> 4350<ul> 4351 <li>the parser itself should work in a fixed amount of memory, except for 4352 information maintained about the stacks of names and entities locations. 4353 The I/O and encoding handlers will probably account for a few KBytes. 4354 This is true for both the XML and HTML parser (though the HTML parser 4355 need more state).</li> 4356 <li>If you are generating the DOM tree then memory requirements will grow 4357 nearly linear with the size of the data. In general for a balanced 4358 textual document the internal memory requirement is about 4 times the 4359 size of the UTF8 serialization of this document (example the XML-1.0 4360 recommendation is a bit more of 150KBytes and takes 650KBytes of main 4361 memory when parsed). Validation will add a amount of memory required for 4362 maintaining the external Dtd state which should be linear with the 4363 complexity of the content model defined by the Dtd</li> 4364 <li>If you need to work with fixed memory requirements or don't need the 4365 full DOM tree then using the <a href="xmlreader.html">xmlReader 4366 interface</a> is probably the best way to proceed, it still allows to 4367 validate or operate on subset of the tree if needed.</li> 4368 <li>If you don't care about the advanced features of libxml2 like 4369 validation, DOM, XPath or XPointer, don't use entities, need to work with 4370 fixed memory requirements, and try to get the fastest parsing possible 4371 then the SAX interface should be used, but it has known restrictions.</li> 4372</ul> 4373 4374<p></p> 4375<h3><a name="Compacting">Returning memory to the kernel</a></h3> 4376 4377<p>You may encounter that your process using libxml2 does not have a 4378reduced memory usage although you freed the trees. This is because 4379libxml2 allocates memory in a number of small chunks. When freeing one 4380of those chunks, the OS may decide that giving this little memory back 4381to the kernel will cause too much overhead and delay the operation. As 4382all chunks are this small, they get actually freed but not returned to 4383the kernel. On systems using glibc, there is a function call 4384"malloc_trim" from malloc.h which does this missing operation (note that 4385it is allowed to fail). Thus, after freeing your tree you may simply try 4386"malloc_trim(0);" to really get the memory back. If your OS does not 4387provide malloc_trim, try searching for a similar function.</p> 4388<p></p> 4389 4390<h2><a name="Encodings">Encodings support</a></h2> 4391 4392<p>If you are not really familiar with Internationalization (usual shortcut 4393is I18N) , Unicode, characters and glyphs, I suggest you read a <a 4394href="http://www.tbray.org/ongoing/When/200x/2003/04/06/Unicode">presentation</a> 4395by Tim Bray on Unicode and why you should care about it.</p> 4396 4397<p>If you don't understand why <b>it does not make sense to have a string 4398without knowing what encoding it uses</b>, then as Joel Spolsky said <a 4399href="http://www.joelonsoftware.com/articles/Unicode.html">please do not 4400write another line of code until you finish reading that article.</a>. It is 4401a prerequisite to understand this page, and avoid a lot of problems with 4402libxml2, XML or text processing in general.</p> 4403 4404<p>Table of Content:</p> 4405<ol> 4406 <li><a href="encoding.html#What">What does internationalization support 4407 mean ?</a></li> 4408 <li><a href="encoding.html#internal">The internal encoding, how and 4409 why</a></li> 4410 <li><a href="encoding.html#implemente">How is it implemented ?</a></li> 4411 <li><a href="encoding.html#Default">Default supported encodings</a></li> 4412 <li><a href="encoding.html#extend">How to extend the existing 4413 support</a></li> 4414</ol> 4415 4416<h3><a name="What">What does internationalization support mean ?</a></h3> 4417 4418<p>XML was designed from the start to allow the support of any character set 4419by using Unicode. Any conformant XML parser has to support the UTF-8 and 4420UTF-16 default encodings which can both express the full unicode ranges. UTF8 4421is a variable length encoding whose greatest points are to reuse the same 4422encoding for ASCII and to save space for Western encodings, but it is a bit 4423more complex to handle in practice. UTF-16 use 2 bytes per character (and 4424sometimes combines two pairs), it makes implementation easier, but looks a 4425bit overkill for Western languages encoding. Moreover the XML specification 4426allows the document to be encoded in other encodings at the condition that 4427they are clearly labeled as such. For example the following is a wellformed 4428XML document encoded in ISO-8859-1 and using accentuated letters that we 4429French like for both markup and content:</p> 4430<pre><?xml version="1.0" encoding="ISO-8859-1"?> 4431<très>là </très></pre> 4432 4433<p>Having internationalization support in libxml2 means the following:</p> 4434<ul> 4435 <li>the document is properly parsed</li> 4436 <li>information about it's encoding is saved</li> 4437 <li>it can be modified</li> 4438 <li>it can be saved in its original encoding</li> 4439 <li>it can also be saved in another encoding supported by libxml2 (for 4440 example straight UTF8 or even an ASCII form)</li> 4441</ul> 4442 4443<p>Another very important point is that the whole libxml2 API, with the 4444exception of a few routines to read with a specific encoding or save to a 4445specific encoding, is completely agnostic about the original encoding of the 4446document.</p> 4447 4448<p>It should be noted too that the HTML parser embedded in libxml2 now obey 4449the same rules too, the following document will be (as of 2.2.2) handled in 4450an internationalized fashion by libxml2 too:</p> 4451<pre><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" 4452 "http://www.w3.org/TR/REC-html40/loose.dtd"> 4453<html lang="fr"> 4454<head> 4455 <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"> 4456</head> 4457<body> 4458<p>W3C crée des standards pour le Web.</body> 4459</html></pre> 4460 4461<h3><a name="internal">The internal encoding, how and why</a></h3> 4462 4463<p>One of the core decisions was to force all documents to be converted to a 4464default internal encoding, and that encoding to be UTF-8, here are the 4465rationales for those choices:</p> 4466<ul> 4467 <li>keeping the native encoding in the internal form would force the libxml 4468 users (or the code associated) to be fully aware of the encoding of the 4469 original document, for examples when adding a text node to a document, 4470 the content would have to be provided in the document encoding, i.e. the 4471 client code would have to check it before hand, make sure it's conformant 4472 to the encoding, etc ... Very hard in practice, though in some specific 4473 cases this may make sense.</li> 4474 <li>the second decision was which encoding. From the XML spec only UTF8 and 4475 UTF16 really makes sense as being the two only encodings for which there 4476 is mandatory support. UCS-4 (32 bits fixed size encoding) could be 4477 considered an intelligent choice too since it's a direct Unicode mapping 4478 support. I selected UTF-8 on the basis of efficiency and compatibility 4479 with surrounding software: 4480 <ul> 4481 <li>UTF-8 while a bit more complex to convert from/to (i.e. slightly 4482 more costly to import and export CPU wise) is also far more compact 4483 than UTF-16 (and UCS-4) for a majority of the documents I see it used 4484 for right now (RPM RDF catalogs, advogato data, various configuration 4485 file formats, etc.) and the key point for today's computer 4486 architecture is efficient uses of caches. If one nearly double the 4487 memory requirement to store the same amount of data, this will trash 4488 caches (main memory/external caches/internal caches) and my take is 4489 that this harms the system far more than the CPU requirements needed 4490 for the conversion to UTF-8</li> 4491 <li>Most of libxml2 version 1 users were using it with straight ASCII 4492 most of the time, doing the conversion with an internal encoding 4493 requiring all their code to be rewritten was a serious show-stopper 4494 for using UTF-16 or UCS-4.</li> 4495 <li>UTF-8 is being used as the de-facto internal encoding standard for 4496 related code like the <a href="http://www.pango.org/">pango</a> 4497 upcoming Gnome text widget, and a lot of Unix code (yet another place 4498 where Unix programmer base takes a different approach from Microsoft 4499 - they are using UTF-16)</li> 4500 </ul> 4501 </li> 4502</ul> 4503 4504<p>What does this mean in practice for the libxml2 user:</p> 4505<ul> 4506 <li>xmlChar, the libxml2 data type is a byte, those bytes must be assembled 4507 as UTF-8 valid strings. The proper way to terminate an xmlChar * string 4508 is simply to append 0 byte, as usual.</li> 4509 <li>One just need to make sure that when using chars outside the ASCII set, 4510 the values has been properly converted to UTF-8</li> 4511</ul> 4512 4513<h3><a name="implemente">How is it implemented ?</a></h3> 4514 4515<p>Let's describe how all this works within libxml, basically the I18N 4516(internationalization) support get triggered only during I/O operation, i.e. 4517when reading a document or saving one. Let's look first at the reading 4518sequence:</p> 4519<ol> 4520 <li>when a document is processed, we usually don't know the encoding, a 4521 simple heuristic allows to detect UTF-16 and UCS-4 from encodings where 4522 the ASCII range (0-0x7F) maps with ASCII</li> 4523 <li>the xml declaration if available is parsed, including the encoding 4524 declaration. At that point, if the autodetected encoding is different 4525 from the one declared a call to xmlSwitchEncoding() is issued.</li> 4526 <li>If there is no encoding declaration, then the input has to be in either 4527 UTF-8 or UTF-16, if it is not then at some point when processing the 4528 input, the converter/checker of UTF-8 form will raise an encoding error. 4529 You may end-up with a garbled document, or no document at all ! Example: 4530 <pre>~/XML -> ./xmllint err.xml 4531err.xml:1: error: Input is not proper UTF-8, indicate encoding ! 4532<très>là </très> 4533 ^ 4534err.xml:1: error: Bytes: 0xE8 0x73 0x3E 0x6C 4535<très>là </très> 4536 ^</pre> 4537 </li> 4538 <li>xmlSwitchEncoding() does an encoding name lookup, canonicalize it, and 4539 then search the default registered encoding converters for that encoding. 4540 If it's not within the default set and iconv() support has been compiled 4541 it, it will ask iconv for such an encoder. If this fails then the parser 4542 will report an error and stops processing: 4543 <pre>~/XML -> ./xmllint err2.xml 4544err2.xml:1: error: Unsupported encoding UnsupportedEnc 4545<?xml version="1.0" encoding="UnsupportedEnc"?> 4546 ^</pre> 4547 </li> 4548 <li>From that point the encoder processes progressively the input (it is 4549 plugged as a front-end to the I/O module) for that entity. It captures 4550 and converts on-the-fly the document to be parsed to UTF-8. The parser 4551 itself just does UTF-8 checking of this input and process it 4552 transparently. The only difference is that the encoding information has 4553 been added to the parsing context (more precisely to the input 4554 corresponding to this entity).</li> 4555 <li>The result (when using DOM) is an internal form completely in UTF-8 4556 with just an encoding information on the document node.</li> 4557</ol> 4558 4559<p>Ok then what happens when saving the document (assuming you 4560collected/built an xmlDoc DOM like structure) ? It depends on the function 4561called, xmlSaveFile() will just try to save in the original encoding, while 4562xmlSaveFileTo() and xmlSaveFileEnc() can optionally save to a given 4563encoding:</p> 4564<ol> 4565 <li>if no encoding is given, libxml2 will look for an encoding value 4566 associated to the document and if it exists will try to save to that 4567 encoding, 4568 <p>otherwise everything is written in the internal form, i.e. UTF-8</p> 4569 </li> 4570 <li>so if an encoding was specified, either at the API level or on the 4571 document, libxml2 will again canonicalize the encoding name, lookup for a 4572 converter in the registered set or through iconv. If not found the 4573 function will return an error code</li> 4574 <li>the converter is placed before the I/O buffer layer, as another kind of 4575 buffer, then libxml2 will simply push the UTF-8 serialization to through 4576 that buffer, which will then progressively be converted and pushed onto 4577 the I/O layer.</li> 4578 <li>It is possible that the converter code fails on some input, for example 4579 trying to push an UTF-8 encoded Chinese character through the UTF-8 to 4580 ISO-8859-1 converter won't work. Since the encoders are progressive they 4581 will just report the error and the number of bytes converted, at that 4582 point libxml2 will decode the offending character, remove it from the 4583 buffer and replace it with the associated charRef encoding &#123; and 4584 resume the conversion. This guarantees that any document will be saved 4585 without losses (except for markup names where this is not legal, this is 4586 a problem in the current version, in practice avoid using non-ascii 4587 characters for tag or attribute names). A special "ascii" encoding name 4588 is used to save documents to a pure ascii form can be used when 4589 portability is really crucial</li> 4590</ol> 4591 4592<p>Here are a few examples based on the same test document and assumin a 4593terminal using ISO-8859-1 as the text encoding:</p> 4594<pre>~/XML -> ./xmllint isolat1 4595<?xml version="1.0" encoding="ISO-8859-1"?> 4596<très>là </très> 4597~/XML -> ./xmllint --encode UTF-8 isolat1 4598<?xml version="1.0" encoding="UTF-8"?> 4599<très>là </très> 4600~/XML -> </pre> 4601 4602<p>The same processing is applied (and reuse most of the code) for HTML I18N 4603processing. Looking up and modifying the content encoding is a bit more 4604difficult since it is located in a <meta> tag under the <head>, 4605so a couple of functions htmlGetMetaEncoding() and htmlSetMetaEncoding() have 4606been provided. The parser also attempts to switch encoding on the fly when 4607detecting such a tag on input. Except for that the processing is the same 4608(and again reuses the same code).</p> 4609 4610<h3><a name="Default">Default supported encodings</a></h3> 4611 4612<p>libxml2 has a set of default converters for the following encodings 4613(located in encoding.c):</p> 4614<ol> 4615 <li>UTF-8 is supported by default (null handlers)</li> 4616 <li>UTF-16, both little and big endian</li> 4617 <li>ISO-Latin-1 (ISO-8859-1) covering most western languages</li> 4618 <li>ASCII, useful mostly for saving</li> 4619 <li>HTML, a specific handler for the conversion of UTF-8 to ASCII with HTML 4620 predefined entities like &copy; for the Copyright sign.</li> 4621</ol> 4622 4623<p>More over when compiled on an Unix platform with iconv support the full 4624set of encodings supported by iconv can be instantly be used by libxml. On a 4625linux machine with glibc-2.1 the list of supported encodings and aliases fill 46263 full pages, and include UCS-4, the full set of ISO-Latin encodings, and the 4627various Japanese ones.</p> 4628 4629<p>To convert from the UTF-8 values returned from the API to another encoding 4630then it is possible to use the function provided from <a 4631href="html/libxml-encoding.html">the encoding module</a> like <a 4632href="html/libxml-encoding.html#UTF8Toisolat1">UTF8Toisolat1</a>, or use the 4633POSIX <a 4634href="http://www.opengroup.org/onlinepubs/009695399/functions/iconv.html">iconv()</a> 4635API directly.</p> 4636 4637<h4>Encoding aliases</h4> 4638 4639<p>From 2.2.3, libxml2 has support to register encoding names aliases. The 4640goal is to be able to parse document whose encoding is supported but where 4641the name differs (for example from the default set of names accepted by 4642iconv). The following functions allow to register and handle new aliases for 4643existing encodings. Once registered libxml2 will automatically lookup the 4644aliases when handling a document:</p> 4645<ul> 4646 <li>int xmlAddEncodingAlias(const char *name, const char *alias);</li> 4647 <li>int xmlDelEncodingAlias(const char *alias);</li> 4648 <li>const char * xmlGetEncodingAlias(const char *alias);</li> 4649 <li>void xmlCleanupEncodingAliases(void);</li> 4650</ul> 4651 4652<h3><a name="extend">How to extend the existing support</a></h3> 4653 4654<p>Well adding support for new encoding, or overriding one of the encoders 4655(assuming it is buggy) should not be hard, just write input and output 4656conversion routines to/from UTF-8, and register them using 4657xmlNewCharEncodingHandler(name, xxxToUTF8, UTF8Toxxx), and they will be 4658called automatically if the parser(s) encounter such an encoding name 4659(register it uppercase, this will help). The description of the encoders, 4660their arguments and expected return values are described in the encoding.h 4661header.</p> 4662 4663<h2><a name="IO">I/O Interfaces</a></h2> 4664 4665<p>Table of Content:</p> 4666<ol> 4667 <li><a href="#General1">General overview</a></li> 4668 <li><a href="#basic">The basic buffer type</a></li> 4669 <li><a href="#Input">Input I/O handlers</a></li> 4670 <li><a href="#Output">Output I/O handlers</a></li> 4671 <li><a href="#entities">The entities loader</a></li> 4672 <li><a href="#Example2">Example of customized I/O</a></li> 4673</ol> 4674 4675<h3><a name="General1">General overview</a></h3> 4676 4677<p>The module <code><a 4678href="http://xmlsoft.org/html/libxml-xmlio.html">xmlIO.h</a></code> provides 4679the interfaces to the libxml2 I/O system. This consists of 4 main parts:</p> 4680<ul> 4681 <li>Entities loader, this is a routine which tries to fetch the entities 4682 (files) based on their PUBLIC and SYSTEM identifiers. The default loader 4683 don't look at the public identifier since libxml2 do not maintain a 4684 catalog. You can redefine you own entity loader by using 4685 <code>xmlGetExternalEntityLoader()</code> and 4686 <code>xmlSetExternalEntityLoader()</code>. <a href="#entities">Check the 4687 example</a>.</li> 4688 <li>Input I/O buffers which are a commodity structure used by the parser(s) 4689 input layer to handle fetching the information to feed the parser. This 4690 provides buffering and is also a placeholder where the encoding 4691 converters to UTF8 are piggy-backed.</li> 4692 <li>Output I/O buffers are similar to the Input ones and fulfill similar 4693 task but when generating a serialization from a tree.</li> 4694 <li>A mechanism to register sets of I/O callbacks and associate them with 4695 specific naming schemes like the protocol part of the URIs. 4696 <p>This affect the default I/O operations and allows to use specific I/O 4697 handlers for certain names.</p> 4698 </li> 4699</ul> 4700 4701<p>The general mechanism used when loading http://rpmfind.net/xml.html for 4702example in the HTML parser is the following:</p> 4703<ol> 4704 <li>The default entity loader calls <code>xmlNewInputFromFile()</code> with 4705 the parsing context and the URI string.</li> 4706 <li>the URI string is checked against the existing registered handlers 4707 using their match() callback function, if the HTTP module was compiled 4708 in, it is registered and its match() function will succeeds</li> 4709 <li>the open() function of the handler is called and if successful will 4710 return an I/O Input buffer</li> 4711 <li>the parser will the start reading from this buffer and progressively 4712 fetch information from the resource, calling the read() function of the 4713 handler until the resource is exhausted</li> 4714 <li>if an encoding change is detected it will be installed on the input 4715 buffer, providing buffering and efficient use of the conversion 4716 routines</li> 4717 <li>once the parser has finished, the close() function of the handler is 4718 called once and the Input buffer and associated resources are 4719 deallocated.</li> 4720</ol> 4721 4722<p>The user defined callbacks are checked first to allow overriding of the 4723default libxml2 I/O routines.</p> 4724 4725<h3><a name="basic">The basic buffer type</a></h3> 4726 4727<p>All the buffer manipulation handling is done using the 4728<code>xmlBuffer</code> type define in <code><a 4729href="http://xmlsoft.org/html/libxml-tree.html">tree.h</a> </code>which is a 4730resizable memory buffer. The buffer allocation strategy can be selected to be 4731either best-fit or use an exponential doubling one (CPU vs. memory use 4732trade-off). The values are <code>XML_BUFFER_ALLOC_EXACT</code> and 4733<code>XML_BUFFER_ALLOC_DOUBLEIT</code>, and can be set individually or on a 4734system wide basis using <code>xmlBufferSetAllocationScheme()</code>. A number 4735of functions allows to manipulate buffers with names starting with the 4736<code>xmlBuffer...</code> prefix.</p> 4737 4738<h3><a name="Input">Input I/O handlers</a></h3> 4739 4740<p>An Input I/O handler is a simple structure 4741<code>xmlParserInputBuffer</code> containing a context associated to the 4742resource (file descriptor, or pointer to a protocol handler), the read() and 4743close() callbacks to use and an xmlBuffer. And extra xmlBuffer and a charset 4744encoding handler are also present to support charset conversion when 4745needed.</p> 4746 4747<h3><a name="Output">Output I/O handlers</a></h3> 4748 4749<p>An Output handler <code>xmlOutputBuffer</code> is completely similar to an 4750Input one except the callbacks are write() and close().</p> 4751 4752<h3><a name="entities">The entities loader</a></h3> 4753 4754<p>The entity loader resolves requests for new entities and create inputs for 4755the parser. Creating an input from a filename or an URI string is done 4756through the xmlNewInputFromFile() routine. The default entity loader do not 4757handle the PUBLIC identifier associated with an entity (if any). So it just 4758calls xmlNewInputFromFile() with the SYSTEM identifier (which is mandatory in 4759XML).</p> 4760 4761<p>If you want to hook up a catalog mechanism then you simply need to 4762override the default entity loader, here is an example:</p> 4763<pre>#include <libxml/xmlIO.h> 4764 4765xmlExternalEntityLoader defaultLoader = NULL; 4766 4767xmlParserInputPtr 4768xmlMyExternalEntityLoader(const char *URL, const char *ID, 4769 xmlParserCtxtPtr ctxt) { 4770 xmlParserInputPtr ret; 4771 const char *fileID = NULL; 4772 /* lookup for the fileID depending on ID */ 4773 4774 ret = xmlNewInputFromFile(ctxt, fileID); 4775 if (ret != NULL) 4776 return(ret); 4777 if (defaultLoader != NULL) 4778 ret = defaultLoader(URL, ID, ctxt); 4779 return(ret); 4780} 4781 4782int main(..) { 4783 ... 4784 4785 /* 4786 * Install our own entity loader 4787 */ 4788 defaultLoader = xmlGetExternalEntityLoader(); 4789 xmlSetExternalEntityLoader(xmlMyExternalEntityLoader); 4790 4791 ... 4792}</pre> 4793 4794<h3><a name="Example2">Example of customized I/O</a></h3> 4795 4796<p>This example come from <a href="http://xmlsoft.org/messages/0708.html">a 4797real use case</a>, xmlDocDump() closes the FILE * passed by the application 4798and this was a problem. The <a 4799href="http://xmlsoft.org/messages/0711.html">solution</a> was to redefine a 4800new output handler with the closing call deactivated:</p> 4801<ol> 4802 <li>First define a new I/O output allocator where the output don't close 4803 the file: 4804 <pre>xmlOutputBufferPtr 4805xmlOutputBufferCreateOwn(FILE *file, xmlCharEncodingHandlerPtr encoder) { 4806 xmlOutputBufferPtr ret; 4807 4808 if (xmlOutputCallbackInitialized == 0) 4809 xmlRegisterDefaultOutputCallbacks(); 4810 4811 if (file == NULL) return(NULL); 4812 ret = xmlAllocOutputBuffer(encoder); 4813 if (ret != NULL) { 4814 ret->context = file; 4815 ret->writecallback = xmlFileWrite; 4816 ret->closecallback = NULL; /* No close callback */ 4817 } 4818 return(ret); 4819} </pre> 4820 </li> 4821 <li>And then use it to save the document: 4822 <pre>FILE *f; 4823xmlOutputBufferPtr output; 4824xmlDocPtr doc; 4825int res; 4826 4827f = ... 4828doc = .... 4829 4830output = xmlOutputBufferCreateOwn(f, NULL); 4831res = xmlSaveFileTo(output, doc, NULL); 4832 </pre> 4833 </li> 4834</ol> 4835 4836<h2><a name="Catalog">Catalog support</a></h2> 4837 4838<p>Table of Content:</p> 4839<ol> 4840 <li><a href="General2">General overview</a></li> 4841 <li><a href="#definition">The definition</a></li> 4842 <li><a href="#Simple">Using catalogs</a></li> 4843 <li><a href="#Some">Some examples</a></li> 4844 <li><a href="#reference">How to tune catalog usage</a></li> 4845 <li><a href="#validate">How to debug catalog processing</a></li> 4846 <li><a href="#Declaring">How to create and maintain catalogs</a></li> 4847 <li><a href="#implemento">The implementor corner quick review of the 4848 API</a></li> 4849 <li><a href="#Other">Other resources</a></li> 4850</ol> 4851 4852<h3><a name="General2">General overview</a></h3> 4853 4854<p>What is a catalog? Basically it's a lookup mechanism used when an entity 4855(a file or a remote resource) references another entity. The catalog lookup 4856is inserted between the moment the reference is recognized by the software 4857(XML parser, stylesheet processing, or even images referenced for inclusion 4858in a rendering) and the time where loading that resource is actually 4859started.</p> 4860 4861<p>It is basically used for 3 things:</p> 4862<ul> 4863 <li>mapping from "logical" names, the public identifiers and a more 4864 concrete name usable for download (and URI). For example it can associate 4865 the logical name 4866 <p>"-//OASIS//DTD DocBook XML V4.1.2//EN"</p> 4867 <p>of the DocBook 4.1.2 XML DTD with the actual URL where it can be 4868 downloaded</p> 4869 <p>http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd</p> 4870 </li> 4871 <li>remapping from a given URL to another one, like an HTTP indirection 4872 saying that 4873 <p>"http://www.oasis-open.org/committes/tr.xsl"</p> 4874 <p>should really be looked at</p> 4875 <p>"http://www.oasis-open.org/committes/entity/stylesheets/base/tr.xsl"</p> 4876 </li> 4877 <li>providing a local cache mechanism allowing to load the entities 4878 associated to public identifiers or remote resources, this is a really 4879 important feature for any significant deployment of XML or SGML since it 4880 allows to avoid the aleas and delays associated to fetching remote 4881 resources.</li> 4882</ul> 4883 4884<h3><a name="definition">The definitions</a></h3> 4885 4886<p>Libxml, as of 2.4.3 implements 2 kind of catalogs:</p> 4887<ul> 4888 <li>the older SGML catalogs, the official spec is SGML Open Technical 4889 Resolution TR9401:1997, but is better understood by reading <a 4890 href="http://www.jclark.com/sp/catalog.htm">the SP Catalog page</a> from 4891 James Clark. This is relatively old and not the preferred mode of 4892 operation of libxml.</li> 4893 <li><a href="http://www.oasis-open.org/committees/entity/spec.html">XML 4894 Catalogs</a> is far more flexible, more recent, uses an XML syntax and 4895 should scale quite better. This is the default option of libxml.</li> 4896</ul> 4897 4898<p></p> 4899 4900<h3><a name="Simple">Using catalog</a></h3> 4901 4902<p>In a normal environment libxml2 will by default check the presence of a 4903catalog in /etc/xml/catalog, and assuming it has been correctly populated, 4904the processing is completely transparent to the document user. To take a 4905concrete example, suppose you are authoring a DocBook document, this one 4906starts with the following DOCTYPE definition:</p> 4907<pre><?xml version='1.0'?> 4908<!DOCTYPE book PUBLIC "-//Norman Walsh//DTD DocBk XML V3.1.4//EN" 4909 "http://nwalsh.com/docbook/xml/3.1.4/db3xml.dtd"></pre> 4910 4911<p>When validating the document with libxml, the catalog will be 4912automatically consulted to lookup the public identifier "-//Norman Walsh//DTD 4913DocBk XML V3.1.4//EN" and the system identifier 4914"http://nwalsh.com/docbook/xml/3.1.4/db3xml.dtd", and if these entities have 4915been installed on your system and the catalogs actually point to them, libxml 4916will fetch them from the local disk.</p> 4917 4918<p style="font-size: 10pt"><strong>Note</strong>: Really don't use this 4919DOCTYPE example it's a really old version, but is fine as an example.</p> 4920 4921<p>Libxml2 will check the catalog each time that it is requested to load an 4922entity, this includes DTD, external parsed entities, stylesheets, etc ... If 4923your system is correctly configured all the authoring phase and processing 4924should use only local files, even if your document stays portable because it 4925uses the canonical public and system ID, referencing the remote document.</p> 4926 4927<h3><a name="Some">Some examples:</a></h3> 4928 4929<p>Here is a couple of fragments from XML Catalogs used in libxml2 early 4930regression tests in <code>test/catalogs</code> :</p> 4931<pre><?xml version="1.0"?> 4932<!DOCTYPE catalog PUBLIC 4933 "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" 4934 "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"> 4935<catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"> 4936 <public publicId="-//OASIS//DTD DocBook XML V4.1.2//EN" 4937 uri="http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"/> 4938...</pre> 4939 4940<p>This is the beginning of a catalog for DocBook 4.1.2, XML Catalogs are 4941written in XML, there is a specific namespace for catalog elements 4942"urn:oasis:names:tc:entity:xmlns:xml:catalog". The first entry in this 4943catalog is a <code>public</code> mapping it allows to associate a Public 4944Identifier with an URI.</p> 4945<pre>... 4946 <rewriteSystem systemIdStartString="http://www.oasis-open.org/docbook/" 4947 rewritePrefix="file:///usr/share/xml/docbook/"/> 4948...</pre> 4949 4950<p>A <code>rewriteSystem</code> is a very powerful instruction, it says that 4951any URI starting with a given prefix should be looked at another URI 4952constructed by replacing the prefix with an new one. In effect this acts like 4953a cache system for a full area of the Web. In practice it is extremely useful 4954with a file prefix if you have installed a copy of those resources on your 4955local system.</p> 4956<pre>... 4957<delegatePublic publicIdStartString="-//OASIS//DTD XML Catalog //" 4958 catalog="file:///usr/share/xml/docbook.xml"/> 4959<delegatePublic publicIdStartString="-//OASIS//ENTITIES DocBook XML" 4960 catalog="file:///usr/share/xml/docbook.xml"/> 4961<delegatePublic publicIdStartString="-//OASIS//DTD DocBook XML" 4962 catalog="file:///usr/share/xml/docbook.xml"/> 4963<delegateSystem systemIdStartString="http://www.oasis-open.org/docbook/" 4964 catalog="file:///usr/share/xml/docbook.xml"/> 4965<delegateURI uriStartString="http://www.oasis-open.org/docbook/" 4966 catalog="file:///usr/share/xml/docbook.xml"/> 4967...</pre> 4968 4969<p>Delegation is the core features which allows to build a tree of catalogs, 4970easier to maintain than a single catalog, based on Public Identifier, System 4971Identifier or URI prefixes it instructs the catalog software to look up 4972entries in another resource. This feature allow to build hierarchies of 4973catalogs, the set of entries presented should be sufficient to redirect the 4974resolution of all DocBook references to the specific catalog in 4975<code>/usr/share/xml/docbook.xml</code> this one in turn could delegate all 4976references for DocBook 4.2.1 to a specific catalog installed at the same time 4977as the DocBook resources on the local machine.</p> 4978 4979<h3><a name="reference">How to tune catalog usage:</a></h3> 4980 4981<p>The user can change the default catalog behaviour by redirecting queries 4982to its own set of catalogs, this can be done by setting the 4983<code>XML_CATALOG_FILES</code> environment variable to a list of catalogs, an 4984empty one should deactivate loading the default <code>/etc/xml/catalog</code> 4985default catalog</p> 4986 4987<h3><a name="validate">How to debug catalog processing:</a></h3> 4988 4989<p>Setting up the <code>XML_DEBUG_CATALOG</code> environment variable will 4990make libxml2 output debugging information for each catalog operations, for 4991example:</p> 4992<pre>orchis:~/XML -> xmllint --memory --noout test/ent2 4993warning: failed to load external entity "title.xml" 4994orchis:~/XML -> export XML_DEBUG_CATALOG= 4995orchis:~/XML -> xmllint --memory --noout test/ent2 4996Failed to parse catalog /etc/xml/catalog 4997Failed to parse catalog /etc/xml/catalog 4998warning: failed to load external entity "title.xml" 4999Catalogs cleanup 5000orchis:~/XML -> </pre> 5001 5002<p>The test/ent2 references an entity, running the parser from memory makes 5003the base URI unavailable and the the "title.xml" entity cannot be loaded. 5004Setting up the debug environment variable allows to detect that an attempt is 5005made to load the <code>/etc/xml/catalog</code> but since it's not present the 5006resolution fails.</p> 5007 5008<p>But the most advanced way to debug XML catalog processing is to use the 5009<strong>xmlcatalog</strong> command shipped with libxml2, it allows to load 5010catalogs and make resolution queries to see what is going on. This is also 5011used for the regression tests:</p> 5012<pre>orchis:~/XML -> ./xmlcatalog test/catalogs/docbook.xml \ 5013 "-//OASIS//DTD DocBook XML V4.1.2//EN" 5014http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd 5015orchis:~/XML -> </pre> 5016 5017<p>For debugging what is going on, adding one -v flags increase the verbosity 5018level to indicate the processing done (adding a second flag also indicate 5019what elements are recognized at parsing):</p> 5020<pre>orchis:~/XML -> ./xmlcatalog -v test/catalogs/docbook.xml \ 5021 "-//OASIS//DTD DocBook XML V4.1.2//EN" 5022Parsing catalog test/catalogs/docbook.xml's content 5023Found public match -//OASIS//DTD DocBook XML V4.1.2//EN 5024http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd 5025Catalogs cleanup 5026orchis:~/XML -> </pre> 5027 5028<p>A shell interface is also available to debug and process multiple queries 5029(and for regression tests):</p> 5030<pre>orchis:~/XML -> ./xmlcatalog -shell test/catalogs/docbook.xml \ 5031 "-//OASIS//DTD DocBook XML V4.1.2//EN" 5032> help 5033Commands available: 5034public PublicID: make a PUBLIC identifier lookup 5035system SystemID: make a SYSTEM identifier lookup 5036resolve PublicID SystemID: do a full resolver lookup 5037add 'type' 'orig' 'replace' : add an entry 5038del 'values' : remove values 5039dump: print the current catalog state 5040debug: increase the verbosity level 5041quiet: decrease the verbosity level 5042exit: quit the shell 5043> public "-//OASIS//DTD DocBook XML V4.1.2//EN" 5044http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd 5045> quit 5046orchis:~/XML -> </pre> 5047 5048<p>This should be sufficient for most debugging purpose, this was actually 5049used heavily to debug the XML Catalog implementation itself.</p> 5050 5051<h3><a name="Declaring">How to create and maintain</a> catalogs:</h3> 5052 5053<p>Basically XML Catalogs are XML files, you can either use XML tools to 5054manage them or use <strong>xmlcatalog</strong> for this. The basic step is 5055to create a catalog the -create option provide this facility:</p> 5056<pre>orchis:~/XML -> ./xmlcatalog --create tst.xml 5057<?xml version="1.0"?> 5058<!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" 5059 "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"> 5060<catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"/> 5061orchis:~/XML -> </pre> 5062 5063<p>By default xmlcatalog does not overwrite the original catalog and save the 5064result on the standard output, this can be overridden using the -noout 5065option. The <code>-add</code> command allows to add entries in the 5066catalog:</p> 5067<pre>orchis:~/XML -> ./xmlcatalog --noout --create --add "public" \ 5068 "-//OASIS//DTD DocBook XML V4.1.2//EN" \ 5069 http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd tst.xml 5070orchis:~/XML -> cat tst.xml 5071<?xml version="1.0"?> 5072<!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" \ 5073 "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"> 5074<catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"> 5075<public publicId="-//OASIS//DTD DocBook XML V4.1.2//EN" 5076 uri="http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"/> 5077</catalog> 5078orchis:~/XML -> </pre> 5079 5080<p>The <code>-add</code> option will always take 3 parameters even if some of 5081the XML Catalog constructs (like nextCatalog) will have only a single 5082argument, just pass a third empty string, it will be ignored.</p> 5083 5084<p>Similarly the <code>-del</code> option remove matching entries from the 5085catalog:</p> 5086<pre>orchis:~/XML -> ./xmlcatalog --del \ 5087 "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" tst.xml 5088<?xml version="1.0"?> 5089<!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" 5090 "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"> 5091<catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"/> 5092orchis:~/XML -> </pre> 5093 5094<p>The catalog is now empty. Note that the matching of <code>-del</code> is 5095exact and would have worked in a similar fashion with the Public ID 5096string.</p> 5097 5098<p>This is rudimentary but should be sufficient to manage a not too complex 5099catalog tree of resources.</p> 5100 5101<h3><a name="implemento">The implementor corner quick review of the 5102API:</a></h3> 5103 5104<p>First, and like for every other module of libxml, there is an 5105automatically generated <a href="html/libxml-catalog.html">API page for 5106catalog support</a>.</p> 5107 5108<p>The header for the catalog interfaces should be included as:</p> 5109<pre>#include <libxml/catalog.h></pre> 5110 5111<p>The API is voluntarily kept very simple. First it is not obvious that 5112applications really need access to it since it is the default behaviour of 5113libxml2 (Note: it is possible to completely override libxml2 default catalog 5114by using <a href="html/libxml-parser.html">xmlSetExternalEntityLoader</a> to 5115plug an application specific resolver).</p> 5116 5117<p>Basically libxml2 support 2 catalog lists:</p> 5118<ul> 5119 <li>the default one, global shared by all the application</li> 5120 <li>a per-document catalog, this one is built if the document uses the 5121 <code>oasis-xml-catalog</code> PIs to specify its own catalog list, it is 5122 associated to the parser context and destroyed when the parsing context 5123 is destroyed.</li> 5124</ul> 5125 5126<p>the document one will be used first if it exists.</p> 5127 5128<h4>Initialization routines:</h4> 5129 5130<p>xmlInitializeCatalog(), xmlLoadCatalog() and xmlLoadCatalogs() should be 5131used at startup to initialize the catalog, if the catalog should be 5132initialized with specific values xmlLoadCatalog() or xmlLoadCatalogs() 5133should be called before xmlInitializeCatalog() which would otherwise do a 5134default initialization first.</p> 5135 5136<p>The xmlCatalogAddLocal() call is used by the parser to grow the document 5137own catalog list if needed.</p> 5138 5139<h4>Preferences setup:</h4> 5140 5141<p>The XML Catalog spec requires the possibility to select default 5142preferences between public and system delegation, 5143xmlCatalogSetDefaultPrefer() allows this, xmlCatalogSetDefaults() and 5144xmlCatalogGetDefaults() allow to control if XML Catalogs resolution should 5145be forbidden, allowed for global catalog, for document catalog or both, the 5146default is to allow both.</p> 5147 5148<p>And of course xmlCatalogSetDebug() allows to generate debug messages 5149(through the xmlGenericError() mechanism).</p> 5150 5151<h4>Querying routines:</h4> 5152 5153<p>xmlCatalogResolve(), xmlCatalogResolveSystem(), xmlCatalogResolvePublic() 5154and xmlCatalogResolveURI() are relatively explicit if you read the XML 5155Catalog specification they correspond to section 7 algorithms, they should 5156also work if you have loaded an SGML catalog with a simplified semantic.</p> 5157 5158<p>xmlCatalogLocalResolve() and xmlCatalogLocalResolveURI() are the same but 5159operate on the document catalog list</p> 5160 5161<h4>Cleanup and Miscellaneous:</h4> 5162 5163<p>xmlCatalogCleanup() free-up the global catalog, xmlCatalogFreeLocal() is 5164the per-document equivalent.</p> 5165 5166<p>xmlCatalogAdd() and xmlCatalogRemove() are used to dynamically modify the 5167first catalog in the global list, and xmlCatalogDump() allows to dump a 5168catalog state, those routines are primarily designed for xmlcatalog, I'm not 5169sure that exposing more complex interfaces (like navigation ones) would be 5170really useful.</p> 5171 5172<p>The xmlParseCatalogFile() is a function used to load XML Catalog files, 5173it's similar as xmlParseFile() except it bypass all catalog lookups, it's 5174provided because this functionality may be useful for client tools.</p> 5175 5176<h4>threaded environments:</h4> 5177 5178<p>Since the catalog tree is built progressively, some care has been taken to 5179try to avoid troubles in multithreaded environments. The code is now thread 5180safe assuming that the libxml2 library has been compiled with threads 5181support.</p> 5182 5183<p></p> 5184 5185<h3><a name="Other">Other resources</a></h3> 5186 5187<p>The XML Catalog specification is relatively recent so there isn't much 5188literature to point at:</p> 5189<ul> 5190 <li>You can find a good rant from Norm Walsh about <a 5191 href="http://www.arbortext.com/Think_Tank/XML_Resources/Issue_Three/issue_three.html">the 5192 need for catalogs</a>, it provides a lot of context information even if 5193 I don't agree with everything presented. Norm also wrote a more recent 5194 article <a 5195 href="http://wwws.sun.com/software/xml/developers/resolver/article/">XML 5196 entities and URI resolvers</a> describing them.</li> 5197 <li>An <a href="http://home.ccil.org/~cowan/XML/XCatalog.html">old XML 5198 catalog proposal</a> from John Cowan</li> 5199 <li>The <a href="http://www.rddl.org/">Resource Directory Description 5200 Language</a> (RDDL) another catalog system but more oriented toward 5201 providing metadata for XML namespaces.</li> 5202 <li>the page from the OASIS Technical <a 5203 href="http://www.oasis-open.org/committees/entity/">Committee on Entity 5204 Resolution</a> who maintains XML Catalog, you will find pointers to the 5205 specification update, some background and pointers to others tools 5206 providing XML Catalog support</li> 5207 <li>There is a <a href="buildDocBookCatalog">shell script</a> to generate 5208 XML Catalogs for DocBook 4.1.2 . If it can write to the /etc/xml/ 5209 directory, it will set-up /etc/xml/catalog and /etc/xml/docbook based on 5210 the resources found on the system. Otherwise it will just create 5211 ~/xmlcatalog and ~/dbkxmlcatalog and doing: 5212 <p><code>export XML_CATALOG_FILES=$HOME/xmlcatalog</code></p> 5213 <p>should allow to process DocBook documentations without requiring 5214 network accesses for the DTD or stylesheets</p> 5215 </li> 5216 <li>I have uploaded <a href="ftp://xmlsoft.org/libxml2/test/dbk412catalog.tar.gz">a 5217 small tarball</a> containing XML Catalogs for DocBook 4.1.2 which seems 5218 to work fine for me too</li> 5219 <li>The <a href="http://www.xmlsoft.org/xmlcatalog_man.html">xmlcatalog 5220 manual page</a></li> 5221</ul> 5222 5223<p>If you have suggestions for corrections or additions, simply contact 5224me:</p> 5225 5226<h2><a name="library">The parser interfaces</a></h2> 5227 5228<p>This section is directly intended to help programmers getting bootstrapped 5229using the XML tollkit from the C language. It is not intended to be 5230extensive. I hope the automatically generated documents will provide the 5231completeness required, but as a separate set of documents. The interfaces of 5232the XML parser are by principle low level, Those interested in a higher level 5233API should <a href="#DOM">look at DOM</a>.</p> 5234 5235<p>The <a href="html/libxml-parser.html">parser interfaces for XML</a> are 5236separated from the <a href="html/libxml-htmlparser.html">HTML parser 5237interfaces</a>. Let's have a look at how the XML parser can be called:</p> 5238 5239<h3><a name="Invoking">Invoking the parser : the pull method</a></h3> 5240 5241<p>Usually, the first thing to do is to read an XML input. The parser accepts 5242documents either from in-memory strings or from files. The functions are 5243defined in "parser.h":</p> 5244<dl> 5245 <dt><code>xmlDocPtr xmlParseMemory(char *buffer, int size);</code></dt> 5246 <dd><p>Parse a null-terminated string containing the document.</p> 5247 </dd> 5248</dl> 5249<dl> 5250 <dt><code>xmlDocPtr xmlParseFile(const char *filename);</code></dt> 5251 <dd><p>Parse an XML document contained in a (possibly compressed) 5252 file.</p> 5253 </dd> 5254</dl> 5255 5256<p>The parser returns a pointer to the document structure (or NULL in case of 5257failure).</p> 5258 5259<h3 id="Invoking1">Invoking the parser: the push method</h3> 5260 5261<p>In order for the application to keep the control when the document is 5262being fetched (which is common for GUI based programs) libxml2 provides a 5263push interface, too, as of version 1.8.3. Here are the interface 5264functions:</p> 5265<pre>xmlParserCtxtPtr xmlCreatePushParserCtxt(xmlSAXHandlerPtr sax, 5266 void *user_data, 5267 const char *chunk, 5268 int size, 5269 const char *filename); 5270int xmlParseChunk (xmlParserCtxtPtr ctxt, 5271 const char *chunk, 5272 int size, 5273 int terminate);</pre> 5274 5275<p>and here is a simple example showing how to use the interface:</p> 5276<pre> FILE *f; 5277 5278 f = fopen(filename, "r"); 5279 if (f != NULL) { 5280 int res, size = 1024; 5281 char chars[1024]; 5282 xmlParserCtxtPtr ctxt; 5283 5284 res = fread(chars, 1, 4, f); 5285 if (res > 0) { 5286 ctxt = xmlCreatePushParserCtxt(NULL, NULL, 5287 chars, res, filename); 5288 while ((res = fread(chars, 1, size, f)) > 0) { 5289 xmlParseChunk(ctxt, chars, res, 0); 5290 } 5291 xmlParseChunk(ctxt, chars, 0, 1); 5292 doc = ctxt->myDoc; 5293 xmlFreeParserCtxt(ctxt); 5294 } 5295 }</pre> 5296 5297<p>The HTML parser embedded into libxml2 also has a push interface; the 5298functions are just prefixed by "html" rather than "xml".</p> 5299 5300<h3 id="Invoking2">Invoking the parser: the SAX interface</h3> 5301 5302<p>The tree-building interface makes the parser memory-hungry, first loading 5303the document in memory and then building the tree itself. Reading a document 5304without building the tree is possible using the SAX interfaces (see SAX.h and 5305<a href="http://www.daa.com.au/~james/gnome/xml-sax/xml-sax.html">James 5306Henstridge's documentation</a>). Note also that the push interface can be 5307limited to SAX: just use the two first arguments of 5308<code>xmlCreatePushParserCtxt()</code>.</p> 5309 5310<h3><a name="Building">Building a tree from scratch</a></h3> 5311 5312<p>The other way to get an XML tree in memory is by building it. Basically 5313there is a set of functions dedicated to building new elements. (These are 5314also described in <libxml/tree.h>.) For example, here is a piece of 5315code that produces the XML document used in the previous examples:</p> 5316<pre> #include <libxml/tree.h> 5317 xmlDocPtr doc; 5318 xmlNodePtr tree, subtree; 5319 5320 doc = xmlNewDoc("1.0"); 5321 doc->children = xmlNewDocNode(doc, NULL, "EXAMPLE", NULL); 5322 xmlSetProp(doc->children, "prop1", "gnome is great"); 5323 xmlSetProp(doc->children, "prop2", "& linux too"); 5324 tree = xmlNewChild(doc->children, NULL, "head", NULL); 5325 subtree = xmlNewChild(tree, NULL, "title", "Welcome to Gnome"); 5326 tree = xmlNewChild(doc->children, NULL, "chapter", NULL); 5327 subtree = xmlNewChild(tree, NULL, "title", "The Linux adventure"); 5328 subtree = xmlNewChild(tree, NULL, "p", "bla bla bla ..."); 5329 subtree = xmlNewChild(tree, NULL, "image", NULL); 5330 xmlSetProp(subtree, "href", "linus.gif");</pre> 5331 5332<p>Not really rocket science ...</p> 5333 5334<h3><a name="Traversing">Traversing the tree</a></h3> 5335 5336<p>Basically by <a href="html/libxml-tree.html">including "tree.h"</a> your 5337code has access to the internal structure of all the elements of the tree. 5338The names should be somewhat simple like <strong>parent</strong>, 5339<strong>children</strong>, <strong>next</strong>, <strong>prev</strong>, 5340<strong>properties</strong>, etc... For example, still with the previous 5341example:</p> 5342<pre><code>doc->children->children->children</code></pre> 5343 5344<p>points to the title element,</p> 5345<pre>doc->children->children->next->children->children</pre> 5346 5347<p>points to the text node containing the chapter title "The Linux 5348adventure".</p> 5349 5350<p><strong>NOTE</strong>: XML allows <em>PI</em>s and <em>comments</em> to be 5351present before the document root, so <code>doc->children</code> may point 5352to an element which is not the document Root Element; a function 5353<code>xmlDocGetRootElement()</code> was added for this purpose.</p> 5354 5355<h3><a name="Modifying">Modifying the tree</a></h3> 5356 5357<p>Functions are provided for reading and writing the document content. Here 5358is an excerpt from the <a href="html/libxml-tree.html">tree API</a>:</p> 5359<dl> 5360 <dt><code>xmlAttrPtr xmlSetProp(xmlNodePtr node, const xmlChar *name, const 5361 xmlChar *value);</code></dt> 5362 <dd><p>This sets (or changes) an attribute carried by an ELEMENT node. 5363 The value can be NULL.</p> 5364 </dd> 5365</dl> 5366<dl> 5367 <dt><code>const xmlChar *xmlGetProp(xmlNodePtr node, const xmlChar 5368 *name);</code></dt> 5369 <dd><p>This function returns a pointer to new copy of the property 5370 content. Note that the user must deallocate the result.</p> 5371 </dd> 5372</dl> 5373 5374<p>Two functions are provided for reading and writing the text associated 5375with elements:</p> 5376<dl> 5377 <dt><code>xmlNodePtr xmlStringGetNodeList(xmlDocPtr doc, const xmlChar 5378 *value);</code></dt> 5379 <dd><p>This function takes an "external" string and converts it to one 5380 text node or possibly to a list of entity and text nodes. All 5381 non-predefined entity references like &Gnome; will be stored 5382 internally as entity nodes, hence the result of the function may not be 5383 a single node.</p> 5384 </dd> 5385</dl> 5386<dl> 5387 <dt><code>xmlChar *xmlNodeListGetString(xmlDocPtr doc, xmlNodePtr list, int 5388 inLine);</code></dt> 5389 <dd><p>This function is the inverse of 5390 <code>xmlStringGetNodeList()</code>. It generates a new string 5391 containing the content of the text and entity nodes. Note the extra 5392 argument inLine. If this argument is set to 1, the function will expand 5393 entity references. For example, instead of returning the &Gnome; 5394 XML encoding in the string, it will substitute it with its value (say, 5395 "GNU Network Object Model Environment").</p> 5396 </dd> 5397</dl> 5398 5399<h3><a name="Saving">Saving a tree</a></h3> 5400 5401<p>Basically 3 options are possible:</p> 5402<dl> 5403 <dt><code>void xmlDocDumpMemory(xmlDocPtr cur, xmlChar**mem, int 5404 *size);</code></dt> 5405 <dd><p>Returns a buffer into which the document has been saved.</p> 5406 </dd> 5407</dl> 5408<dl> 5409 <dt><code>extern void xmlDocDump(FILE *f, xmlDocPtr doc);</code></dt> 5410 <dd><p>Dumps a document to an open file descriptor.</p> 5411 </dd> 5412</dl> 5413<dl> 5414 <dt><code>int xmlSaveFile(const char *filename, xmlDocPtr cur);</code></dt> 5415 <dd><p>Saves the document to a file. In this case, the compression 5416 interface is triggered if it has been turned on.</p> 5417 </dd> 5418</dl> 5419 5420<h3><a name="Compressio">Compression</a></h3> 5421 5422<p>The library transparently handles compression when doing file-based 5423accesses. The level of compression on saves can be turned on either globally 5424or individually for one file:</p> 5425<dl> 5426 <dt><code>int xmlGetDocCompressMode (xmlDocPtr doc);</code></dt> 5427 <dd><p>Gets the document compression ratio (0-9).</p> 5428 </dd> 5429</dl> 5430<dl> 5431 <dt><code>void xmlSetDocCompressMode (xmlDocPtr doc, int mode);</code></dt> 5432 <dd><p>Sets the document compression ratio.</p> 5433 </dd> 5434</dl> 5435<dl> 5436 <dt><code>int xmlGetCompressMode(void);</code></dt> 5437 <dd><p>Gets the default compression ratio.</p> 5438 </dd> 5439</dl> 5440<dl> 5441 <dt><code>void xmlSetCompressMode(int mode);</code></dt> 5442 <dd><p>Sets the default compression ratio.</p> 5443 </dd> 5444</dl> 5445 5446<h2><a name="Entities">Entities or no entities</a></h2> 5447 5448<p>Entities in principle are similar to simple C macros. An entity defines an 5449abbreviation for a given string that you can reuse many times throughout the 5450content of your document. Entities are especially useful when a given string 5451may occur frequently within a document, or to confine the change needed to a 5452document to a restricted area in the internal subset of the document (at the 5453beginning). Example:</p> 5454<pre>1 <?xml version="1.0"?> 54552 <!DOCTYPE EXAMPLE SYSTEM "example.dtd" [ 54563 <!ENTITY xml "Extensible Markup Language"> 54574 ]> 54585 <EXAMPLE> 54596 &xml; 54607 </EXAMPLE></pre> 5461 5462<p>Line 3 declares the xml entity. Line 6 uses the xml entity, by prefixing 5463its name with '&' and following it by ';' without any spaces added. There 5464are 5 predefined entities in libxml2 allowing you to escape characters with 5465predefined meaning in some parts of the xml document content: 5466<strong>&lt;</strong> for the character '<', <strong>&gt;</strong> 5467for the character '>', <strong>&apos;</strong> for the character ''', 5468<strong>&quot;</strong> for the character '"', and 5469<strong>&amp;</strong> for the character '&'.</p> 5470 5471<p>One of the problems related to entities is that you may want the parser to 5472substitute an entity's content so that you can see the replacement text in 5473your application. Or you may prefer to keep entity references as such in the 5474content to be able to save the document back without losing this usually 5475precious information (if the user went through the pain of explicitly 5476defining entities, he may have a a rather negative attitude if you blindly 5477substitute them as saving time). The <a 5478href="html/libxml-parser.html#xmlSubstituteEntitiesDefault">xmlSubstituteEntitiesDefault()</a> 5479function allows you to check and change the behaviour, which is to not 5480substitute entities by default.</p> 5481 5482<p>Here is the DOM tree built by libxml2 for the previous document in the 5483default case:</p> 5484<pre>/gnome/src/gnome-xml -> ./xmllint --debug test/ent1 5485DOCUMENT 5486version=1.0 5487 ELEMENT EXAMPLE 5488 TEXT 5489 content= 5490 ENTITY_REF 5491 INTERNAL_GENERAL_ENTITY xml 5492 content=Extensible Markup Language 5493 TEXT 5494 content=</pre> 5495 5496<p>And here is the result when substituting entities:</p> 5497<pre>/gnome/src/gnome-xml -> ./tester --debug --noent test/ent1 5498DOCUMENT 5499version=1.0 5500 ELEMENT EXAMPLE 5501 TEXT 5502 content= Extensible Markup Language</pre> 5503 5504<p>So, entities or no entities? Basically, it depends on your use case. I 5505suggest that you keep the non-substituting default behaviour and avoid using 5506entities in your XML document or data if you are not willing to handle the 5507entity references elements in the DOM tree.</p> 5508 5509<p>Note that at save time libxml2 enforces the conversion of the predefined 5510entities where necessary to prevent well-formedness problems, and will also 5511transparently replace those with chars (i.e. it will not generate entity 5512reference elements in the DOM tree or call the reference() SAX callback when 5513finding them in the input).</p> 5514 5515<p><span style="background-color: #FF0000">WARNING</span>: handling entities 5516on top of the libxml2 SAX interface is difficult!!! If you plan to use 5517non-predefined entities in your documents, then the learning curve to handle 5518then using the SAX API may be long. If you plan to use complex documents, I 5519strongly suggest you consider using the DOM interface instead and let libxml 5520deal with the complexity rather than trying to do it yourself.</p> 5521 5522<h2><a name="Namespaces">Namespaces</a></h2> 5523 5524<p>The libxml2 library implements <a 5525href="http://www.w3.org/TR/REC-xml-names/">XML namespaces</a> support by 5526recognizing namespace constructs in the input, and does namespace lookup 5527automatically when building the DOM tree. A namespace declaration is 5528associated with an in-memory structure and all elements or attributes within 5529that namespace point to it. Hence testing the namespace is a simple and fast 5530equality operation at the user level.</p> 5531 5532<p>I suggest that people using libxml2 use a namespace, and declare it in the 5533root element of their document as the default namespace. Then they don't need 5534to use the prefix in the content but we will have a basis for future semantic 5535refinement and merging of data from different sources. This doesn't increase 5536the size of the XML output significantly, but significantly increases its 5537value in the long-term. Example:</p> 5538<pre><mydoc xmlns="http://mydoc.example.org/schemas/"> 5539 <elem1>...</elem1> 5540 <elem2>...</elem2> 5541</mydoc></pre> 5542 5543<p>The namespace value has to be an absolute URL, but the URL doesn't have to 5544point to any existing resource on the Web. It will bind all the element and 5545attributes with that URL. I suggest to use an URL within a domain you 5546control, and that the URL should contain some kind of version information if 5547possible. For example, <code>"http://www.gnome.org/gnumeric/1.0/"</code> is a 5548good namespace scheme.</p> 5549 5550<p>Then when you load a file, make sure that a namespace carrying the 5551version-independent prefix is installed on the root element of your document, 5552and if the version information don't match something you know, warn the user 5553and be liberal in what you accept as the input. Also do *not* try to base 5554namespace checking on the prefix value. <foo:text> may be exactly the 5555same as <bar:text> in another document. What really matters is the URI 5556associated with the element or the attribute, not the prefix string (which is 5557just a shortcut for the full URI). In libxml, element and attributes have an 5558<code>ns</code> field pointing to an xmlNs structure detailing the namespace 5559prefix and its URI.</p> 5560 5561<p>@@Interfaces@@</p> 5562<pre>xmlNodePtr node; 5563if(!strncmp(node->name,"mytag",5) 5564 && node->ns 5565 && !strcmp(node->ns->href,"http://www.mysite.com/myns/1.0")) { 5566 ... 5567}</pre> 5568 5569<p>Usually people object to using namespaces together with validity checking. 5570I will try to make sure that using namespaces won't break validity checking, 5571so even if you plan to use or currently are using validation I strongly 5572suggest adding namespaces to your document. A default namespace scheme 5573<code>xmlns="http://...."</code> should not break validity even on less 5574flexible parsers. Using namespaces to mix and differentiate content coming 5575from multiple DTDs will certainly break current validation schemes. To check 5576such documents one needs to use schema-validation, which is supported in 5577libxml2 as well. See <a href="http://www.relaxng.org/">relagx-ng</a> and <a 5578href="http://www.w3c.org/XML/Schema">w3c-schema</a>.</p> 5579 5580<h2><a name="Upgrading">Upgrading 1.x code</a></h2> 5581 5582<p>Incompatible changes:</p> 5583 5584<p>Version 2 of libxml2 is the first version introducing serious backward 5585incompatible changes. The main goals were:</p> 5586<ul> 5587 <li>a general cleanup. A number of mistakes inherited from the very early 5588 versions couldn't be changed due to compatibility constraints. Example 5589 the "childs" element in the nodes.</li> 5590 <li>Uniformization of the various nodes, at least for their header and link 5591 parts (doc, parent, children, prev, next), the goal is a simpler 5592 programming model and simplifying the task of the DOM implementors.</li> 5593 <li>better conformances to the XML specification, for example version 1.x 5594 had an heuristic to try to detect ignorable white spaces. As a result the 5595 SAX event generated were ignorableWhitespace() while the spec requires 5596 character() in that case. This also mean that a number of DOM node 5597 containing blank text may populate the DOM tree which were not present 5598 before.</li> 5599</ul> 5600 5601<h3>How to fix libxml-1.x code:</h3> 5602 5603<p>So client code of libxml designed to run with version 1.x may have to be 5604changed to compile against version 2.x of libxml. Here is a list of changes 5605that I have collected, they may not be sufficient, so in case you find other 5606change which are required, <a href="mailto:Daniel.Veillard@w3.org">drop me a 5607mail</a>:</p> 5608<ol> 5609 <li>The package name have changed from libxml to libxml2, the library name 5610 is now -lxml2 . There is a new xml2-config script which should be used to 5611 select the right parameters libxml2</li> 5612 <li>Node <strong>childs</strong> field has been renamed 5613 <strong>children</strong> so s/childs/children/g should be applied 5614 (probability of having "childs" anywhere else is close to 0+</li> 5615 <li>The document don't have anymore a <strong>root</strong> element it has 5616 been replaced by <strong>children</strong> and usually you will get a 5617 list of element here. For example a Dtd element for the internal subset 5618 and it's declaration may be found in that list, as well as processing 5619 instructions or comments found before or after the document root element. 5620 Use <strong>xmlDocGetRootElement(doc)</strong> to get the root element of 5621 a document. Alternatively if you are sure to not reference DTDs nor have 5622 PIs or comments before or after the root element 5623 s/->root/->children/g will probably do it.</li> 5624 <li>The white space issue, this one is more complex, unless special case of 5625 validating parsing, the line breaks and spaces usually used for indenting 5626 and formatting the document content becomes significant. So they are 5627 reported by SAX and if your using the DOM tree, corresponding nodes are 5628 generated. Too approach can be taken: 5629 <ol> 5630 <li>lazy one, use the compatibility call 5631 <strong>xmlKeepBlanksDefault(0)</strong> but be aware that you are 5632 relying on a special (and possibly broken) set of heuristics of 5633 libxml to detect ignorable blanks. Don't complain if it breaks or 5634 make your application not 100% clean w.r.t. to it's input.</li> 5635 <li>the Right Way: change you code to accept possibly insignificant 5636 blanks characters, or have your tree populated with weird blank text 5637 nodes. You can spot them using the commodity function 5638 <strong>xmlIsBlankNode(node)</strong> returning 1 for such blank 5639 nodes.</li> 5640 </ol> 5641 <p>Note also that with the new default the output functions don't add any 5642 extra indentation when saving a tree in order to be able to round trip 5643 (read and save) without inflating the document with extra formatting 5644 chars.</p> 5645 </li> 5646 <li>The include path has changed to $prefix/libxml/ and the includes 5647 themselves uses this new prefix in includes instructions... If you are 5648 using (as expected) the 5649 <pre>xml2-config --cflags</pre> 5650 <p>output to generate you compile commands this will probably work out of 5651 the box</p> 5652 </li> 5653 <li>xmlDetectCharEncoding takes an extra argument indicating the length in 5654 byte of the head of the document available for character detection.</li> 5655</ol> 5656 5657<h3>Ensuring both libxml-1.x and libxml-2.x compatibility</h3> 5658 5659<p>Two new version of libxml (1.8.11) and libxml2 (2.3.4) have been released 5660to allow smooth upgrade of existing libxml v1code while retaining 5661compatibility. They offers the following:</p> 5662<ol> 5663 <li>similar include naming, one should use 5664 <strong>#include<libxml/...></strong> in both cases.</li> 5665 <li>similar identifiers defined via macros for the child and root fields: 5666 respectively <strong>xmlChildrenNode</strong> and 5667 <strong>xmlRootNode</strong></li> 5668 <li>a new macro <strong>LIBXML_TEST_VERSION</strong> which should be 5669 inserted once in the client code</li> 5670</ol> 5671 5672<p>So the roadmap to upgrade your existing libxml applications is the 5673following:</p> 5674<ol> 5675 <li>install the libxml-1.8.8 (and libxml-devel-1.8.8) packages</li> 5676 <li>find all occurrences where the xmlDoc <strong>root</strong> field is 5677 used and change it to <strong>xmlRootNode</strong></li> 5678 <li>similarly find all occurrences where the xmlNode 5679 <strong>childs</strong> field is used and change it to 5680 <strong>xmlChildrenNode</strong></li> 5681 <li>add a <strong>LIBXML_TEST_VERSION</strong> macro somewhere in your 5682 <strong>main()</strong> or in the library init entry point</li> 5683 <li>Recompile, check compatibility, it should still work</li> 5684 <li>Change your configure script to look first for xml2-config and fall 5685 back using xml-config . Use the --cflags and --libs output of the command 5686 as the Include and Linking parameters needed to use libxml.</li> 5687 <li>install libxml2-2.3.x and libxml2-devel-2.3.x (libxml-1.8.y and 5688 libxml-devel-1.8.y can be kept simultaneously)</li> 5689 <li>remove your config.cache, relaunch your configuration mechanism, and 5690 recompile, if steps 2 and 3 were done right it should compile as-is</li> 5691 <li>Test that your application is still running correctly, if not this may 5692 be due to extra empty nodes due to formating spaces being kept in libxml2 5693 contrary to libxml1, in that case insert xmlKeepBlanksDefault(1) in your 5694 code before calling the parser (next to 5695 <strong>LIBXML_TEST_VERSION</strong> is a fine place).</li> 5696</ol> 5697 5698<p>Following those steps should work. It worked for some of my own code.</p> 5699 5700<p>Let me put some emphasis on the fact that there is far more changes from 5701libxml 1.x to 2.x than the ones you may have to patch for. The overall code 5702has been considerably cleaned up and the conformance to the XML specification 5703has been drastically improved too. Don't take those changes as an excuse to 5704not upgrade, it may cost a lot on the long term ...</p> 5705 5706<h2><a name="Thread">Thread safety</a></h2> 5707 5708<p>Starting with 2.4.7, libxml2 makes provisions to ensure that concurrent 5709threads can safely work in parallel parsing different documents. There is 5710however a couple of things to do to ensure it:</p> 5711<ul> 5712 <li>configure the library accordingly using the --with-threads options</li> 5713 <li>call xmlInitParser() in the "main" thread before using any of the 5714 libxml2 API (except possibly selecting a different memory allocator)</li> 5715</ul> 5716 5717<p>Note that the thread safety cannot be ensured for multiple threads sharing 5718the same document, the locking must be done at the application level, libxml 5719exports a basic mutex and reentrant mutexes API in <libxml/threads.h>. 5720The parts of the library checked for thread safety are:</p> 5721<ul> 5722 <li>concurrent loading</li> 5723 <li>file access resolution</li> 5724 <li>catalog access</li> 5725 <li>catalog building</li> 5726 <li>entities lookup/accesses</li> 5727 <li>validation</li> 5728 <li>global variables per-thread override</li> 5729 <li>memory handling</li> 5730</ul> 5731 5732<p>XPath has been tested for threaded usage on non-modified document 5733 for example when using libxslt, but make 100% sure the documents 5734 are accessed read-only !</p> 5735 5736<h2><a name="DOM"></a><a name="Principles">DOM Principles</a></h2> 5737 5738<p><a href="http://www.w3.org/DOM/">DOM</a> stands for the <em>Document 5739Object Model</em>; this is an API for accessing XML or HTML structured 5740documents. Native support for DOM in Gnome is on the way (module gnome-dom), 5741and will be based on gnome-xml. This will be a far cleaner interface to 5742manipulate XML files within Gnome since it won't expose the internal 5743structure.</p> 5744 5745<p>The current DOM implementation on top of libxml2 is the <a 5746href="http://svn.gnome.org/viewvc/gdome2/trunk/">gdome2 Gnome module</a>, this 5747is a full DOM interface, thanks to Paolo Casarini, check the <a 5748href="http://gdome2.cs.unibo.it/">Gdome2 homepage</a> for more 5749information.</p> 5750 5751<h2><a name="Example"></a><a name="real">A real example</a></h2> 5752 5753<p>Here is a real size example, where the actual content of the application 5754data is not kept in the DOM tree but uses internal structures. It is based on 5755a proposal to keep a database of jobs related to Gnome, with an XML based 5756storage structure. Here is an <a href="gjobs.xml">XML encoded jobs 5757base</a>:</p> 5758<pre><?xml version="1.0"?> 5759<gjob:Helping xmlns:gjob="http://www.gnome.org/some-location"> 5760 <gjob:Jobs> 5761 5762 <gjob:Job> 5763 <gjob:Project ID="3"/> 5764 <gjob:Application>GBackup</gjob:Application> 5765 <gjob:Category>Development</gjob:Category> 5766 5767 <gjob:Update> 5768 <gjob:Status>Open</gjob:Status> 5769 <gjob:Modified>Mon, 07 Jun 1999 20:27:45 -0400 MET DST</gjob:Modified> 5770 <gjob:Salary>USD 0.00</gjob:Salary> 5771 </gjob:Update> 5772 5773 <gjob:Developers> 5774 <gjob:Developer> 5775 </gjob:Developer> 5776 </gjob:Developers> 5777 5778 <gjob:Contact> 5779 <gjob:Person>Nathan Clemons</gjob:Person> 5780 <gjob:Email>nathan@windsofstorm.net</gjob:Email> 5781 <gjob:Company> 5782 </gjob:Company> 5783 <gjob:Organisation> 5784 </gjob:Organisation> 5785 <gjob:Webpage> 5786 </gjob:Webpage> 5787 <gjob:Snailmail> 5788 </gjob:Snailmail> 5789 <gjob:Phone> 5790 </gjob:Phone> 5791 </gjob:Contact> 5792 5793 <gjob:Requirements> 5794 The program should be released as free software, under the GPL. 5795 </gjob:Requirements> 5796 5797 <gjob:Skills> 5798 </gjob:Skills> 5799 5800 <gjob:Details> 5801 A GNOME based system that will allow a superuser to configure 5802 compressed and uncompressed files and/or file systems to be backed 5803 up with a supported media in the system. This should be able to 5804 perform via find commands generating a list of files that are passed 5805 to tar, dd, cpio, cp, gzip, etc., to be directed to the tape machine 5806 or via operations performed on the filesystem itself. Email 5807 notification and GUI status display very important. 5808 </gjob:Details> 5809 5810 </gjob:Job> 5811 5812 </gjob:Jobs> 5813</gjob:Helping></pre> 5814 5815<p>While loading the XML file into an internal DOM tree is a matter of 5816calling only a couple of functions, browsing the tree to gather the data and 5817generate the internal structures is harder, and more error prone.</p> 5818 5819<p>The suggested principle is to be tolerant with respect to the input 5820structure. For example, the ordering of the attributes is not significant, 5821the XML specification is clear about it. It's also usually a good idea not to 5822depend on the order of the children of a given node, unless it really makes 5823things harder. Here is some code to parse the information for a person:</p> 5824<pre>/* 5825 * A person record 5826 */ 5827typedef struct person { 5828 char *name; 5829 char *email; 5830 char *company; 5831 char *organisation; 5832 char *smail; 5833 char *webPage; 5834 char *phone; 5835} person, *personPtr; 5836 5837/* 5838 * And the code needed to parse it 5839 */ 5840personPtr parsePerson(xmlDocPtr doc, xmlNsPtr ns, xmlNodePtr cur) { 5841 personPtr ret = NULL; 5842 5843DEBUG("parsePerson\n"); 5844 /* 5845 * allocate the struct 5846 */ 5847 ret = (personPtr) malloc(sizeof(person)); 5848 if (ret == NULL) { 5849 fprintf(stderr,"out of memory\n"); 5850 return(NULL); 5851 } 5852 memset(ret, 0, sizeof(person)); 5853 5854 /* We don't care what the top level element name is */ 5855 cur = cur->xmlChildrenNode; 5856 while (cur != NULL) { 5857 if ((!strcmp(cur->name, "Person")) && (cur->ns == ns)) 5858 ret->name = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1); 5859 if ((!strcmp(cur->name, "Email")) && (cur->ns == ns)) 5860 ret->email = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1); 5861 cur = cur->next; 5862 } 5863 5864 return(ret); 5865}</pre> 5866 5867<p>Here are a couple of things to notice:</p> 5868<ul> 5869 <li>Usually a recursive parsing style is the more convenient one: XML data 5870 is by nature subject to repetitive constructs and usually exhibits highly 5871 structured patterns.</li> 5872 <li>The two arguments of type <em>xmlDocPtr</em> and <em>xmlNsPtr</em>, 5873 i.e. the pointer to the global XML document and the namespace reserved to 5874 the application. Document wide information are needed for example to 5875 decode entities and it's a good coding practice to define a namespace for 5876 your application set of data and test that the element and attributes 5877 you're analyzing actually pertains to your application space. This is 5878 done by a simple equality test (cur->ns == ns).</li> 5879 <li>To retrieve text and attributes value, you can use the function 5880 <em>xmlNodeListGetString</em> to gather all the text and entity reference 5881 nodes generated by the DOM output and produce an single text string.</li> 5882</ul> 5883 5884<p>Here is another piece of code used to parse another level of the 5885structure:</p> 5886<pre>#include <libxml/tree.h> 5887/* 5888 * a Description for a Job 5889 */ 5890typedef struct job { 5891 char *projectID; 5892 char *application; 5893 char *category; 5894 personPtr contact; 5895 int nbDevelopers; 5896 personPtr developers[100]; /* using dynamic alloc is left as an exercise */ 5897} job, *jobPtr; 5898 5899/* 5900 * And the code needed to parse it 5901 */ 5902jobPtr parseJob(xmlDocPtr doc, xmlNsPtr ns, xmlNodePtr cur) { 5903 jobPtr ret = NULL; 5904 5905DEBUG("parseJob\n"); 5906 /* 5907 * allocate the struct 5908 */ 5909 ret = (jobPtr) malloc(sizeof(job)); 5910 if (ret == NULL) { 5911 fprintf(stderr,"out of memory\n"); 5912 return(NULL); 5913 } 5914 memset(ret, 0, sizeof(job)); 5915 5916 /* We don't care what the top level element name is */ 5917 cur = cur->xmlChildrenNode; 5918 while (cur != NULL) { 5919 5920 if ((!strcmp(cur->name, "Project")) && (cur->ns == ns)) { 5921 ret->projectID = xmlGetProp(cur, "ID"); 5922 if (ret->projectID == NULL) { 5923 fprintf(stderr, "Project has no ID\n"); 5924 } 5925 } 5926 if ((!strcmp(cur->name, "Application")) && (cur->ns == ns)) 5927 ret->application = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1); 5928 if ((!strcmp(cur->name, "Category")) && (cur->ns == ns)) 5929 ret->category = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1); 5930 if ((!strcmp(cur->name, "Contact")) && (cur->ns == ns)) 5931 ret->contact = parsePerson(doc, ns, cur); 5932 cur = cur->next; 5933 } 5934 5935 return(ret); 5936}</pre> 5937 5938<p>Once you are used to it, writing this kind of code is quite simple, but 5939boring. Ultimately, it could be possible to write stubbers taking either C 5940data structure definitions, a set of XML examples or an XML DTD and produce 5941the code needed to import and export the content between C data and XML 5942storage. This is left as an exercise to the reader :-)</p> 5943 5944<p>Feel free to use <a href="example/gjobread.c">the code for the full C 5945parsing example</a> as a template, it is also available with Makefile in the 5946Gnome SVN base under libxml2/example</p> 5947 5948<h2><a name="Contributi">Contributions</a></h2> 5949<ul> 5950 <li>Bjorn Reese, William Brack and Thomas Broyer have provided a number of 5951 patches, Gary Pennington worked on the validation API, threading support 5952 and Solaris port.</li> 5953 <li>John Fleck helps maintaining the documentation and man pages.</li> 5954 <li><a href="mailto:igor@zlatkovic.com">Igor Zlatkovic</a> is now the 5955 maintainer of the Windows port, <a 5956 href="http://www.zlatkovic.com/projects/libxml/index.html">he provides 5957 binaries</a></li> 5958 <li><a href="mailto:Gary.Pennington@sun.com">Gary Pennington</a> provides 5959 <a href="http://garypennington.net/libxml2/">Solaris binaries</a></li> 5960 <li><a 5961 href="http://mail.gnome.org/archives/xml/2001-March/msg00014.html">Matt 5962 Sergeant</a> developed <a 5963 href="http://axkit.org/download/">XML::LibXSLT</a>, a Perl wrapper for 5964 libxml2/libxslt as part of the <a href="http://axkit.com/">AxKit XML 5965 application server</a></li> 5966 <li><a href="mailto:fnatter@gmx.net">Felix Natter</a> and <a 5967 href="mailto:geertk@ai.rug.nl">Geert Kloosterman</a> provide <a 5968 href="libxml-doc.el">an emacs module</a> to lookup libxml(2) functions 5969 documentation</li> 5970 <li><a href="mailto:sherwin@nlm.nih.gov">Ziying Sherwin</a> provided <a 5971 href="http://xmlsoft.org/messages/0488.html">man pages</a></li> 5972 <li>there is a module for <a 5973 href="http://acs-misc.sourceforge.net/nsxml.html">libxml/libxslt support 5974 in OpenNSD/AOLServer</a></li> 5975 <li><a href="mailto:dkuhlman@cutter.rexx.com">Dave Kuhlman</a> provided the 5976 first version of libxml/libxslt <a 5977 href="http://www.rexx.com/~dkuhlman">wrappers for Python</a></li> 5978 <li>Petr Kozelka provides <a 5979 href="http://sourceforge.net/projects/libxml2-pas">Pascal units to glue 5980 libxml2</a> with Kylix and Delphi and other Pascal compilers</li> 5981 <li><a href="mailto:aleksey@aleksey.com">Aleksey Sanin</a> implemented the 5982 <a href="http://www.w3.org/Signature/">XML Canonicalization and XML 5983 Digital Signature</a> <a 5984 href="http://www.aleksey.com/xmlsec/">implementations for libxml2</a></li> 5985 <li><a href="mailto:Steve.Ball@explain.com.au">Steve Ball</a> and 5986 contributors maintain <a href="http://tclxml.sourceforge.net/">tcl 5987 bindings for libxml2 and libxslt</a>, as well as <a 5988 href="http://tclxml.sf.net/tkxmllint.html">tkxmllint</a> a GUI for 5989 xmllint and <a href="http://tclxml.sf.net/tkxsltproc.html">tkxsltproc</a> 5990 a GUI for xsltproc.</li> 5991</ul> 5992 5993<p></p> 5994</body> 5995</html> 5996
