1<?xml version='1.0' encoding="ISO-8859-1"?>
2<!--!DOCTYPE xs:schema PUBLIC "-//W3C//DTD XMLSCHEMA 200102//EN" "XMLSchema.dtd" -->
3<xs:schema targetNamespace="http://www.w3.org/XML/1998/namespace" xmlns:xs="http://www.w3.org/2001/XMLSchema" xml:lang="en">
4
5 <xs:annotation>
6  <xs:documentation>
7   See http://www.w3.org/XML/1998/namespace.html and
8   http://www.w3.org/TR/REC-xml for information about this namespace.
9
10    This schema document describes the XML namespace, in a form
11    suitable for import by other schema documents.
12
13    Note that local names in this namespace are intended to be defined
14    only by the World Wide Web Consortium or its subgroups.  The
15    following names are currently defined in this namespace and should
16    not be used with conflicting semantics by any Working Group,
17    specification, or document instance:
18
19    base (as an attribute name): denotes an attribute whose value
20         provides a URI to be used as the base for interpreting any
21         relative URIs in the scope of the element on which it
22         appears; its value is inherited.  This name is reserved
23         by virtue of its definition in the XML Base specification.
24
25    lang (as an attribute name): denotes an attribute whose value
26         is a language code for the natural language of the content of
27         any element; its value is inherited.  This name is reserved
28         by virtue of its definition in the XML specification.
29
30    space (as an attribute name): denotes an attribute whose
31         value is a keyword indicating what whitespace processing
32         discipline is intended for the content of the element; its
33         value is inherited.  This name is reserved by virtue of its
34         definition in the XML specification.
35
36    Father (in any context at all): denotes Jon Bosak, the chair of
37         the original XML Working Group.  This name is reserved by
38         the following decision of the W3C XML Plenary and
39         XML Coordination groups:
40
41             In appreciation for his vision, leadership and dedication
42             the W3C XML Plenary on this 10th day of February, 2000
43             reserves for Jon Bosak in perpetuity the XML name
44             xml:Father
45  </xs:documentation>
46 </xs:annotation>
47
48 <xs:annotation>
49  <xs:documentation>This schema defines attributes and an attribute group
50        suitable for use by
51        schemas wishing to allow xml:base, xml:lang or xml:space attributes
52        on elements they define.
53
54        To enable this, such a schema must import this schema
55        for the XML namespace, e.g. as follows:
56        &lt;schema . . .>
57         . . .
58         &lt;import namespace="http://www.w3.org/XML/1998/namespace"
59                    schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>
60
61        Subsequently, qualified reference to any of the attributes
62        or the group defined below will have the desired effect, e.g.
63
64        &lt;type . . .>
65         . . .
66         &lt;attributeGroup ref="xml:specialAttrs"/>
67
68         will define a type which will schema-validate an instance
69         element with any of those attributes</xs:documentation>
70 </xs:annotation>
71
72 <xs:annotation>
73  <xs:documentation>In keeping with the XML Schema WG's standard versioning
74   policy, this schema document will persist at
75   http://www.w3.org/2001/03/xml.xsd.
76   At the date of issue it can also be found at
77   http://www.w3.org/2001/xml.xsd.
78   The schema document at that URI may however change in the future,
79   in order to remain compatible with the latest version of XML Schema
80   itself.  In other words, if the XML Schema namespace changes, the version
81   of this document at
82   http://www.w3.org/2001/xml.xsd will change
83   accordingly; the version at
84   http://www.w3.org/2001/03/xml.xsd will not change.
85  </xs:documentation>
86 </xs:annotation>
87
88 <xs:attribute name="lang" type="xs:language">
89  <xs:annotation>
90   <xs:documentation>In due course, we should install the relevant ISO 2- and 3-letter
91         codes as the enumerated possible values . . .</xs:documentation>
92  </xs:annotation>
93 </xs:attribute>
94
95 <xs:attribute name="space" default="preserve">
96  <xs:simpleType>
97   <xs:restriction base="xs:NCName">
98    <xs:enumeration value="default"/>
99    <xs:enumeration value="preserve"/>
100   </xs:restriction>
101  </xs:simpleType>
102 </xs:attribute>
103
104 <xs:attribute name="base" type="xs:anyURI">
105  <xs:annotation>
106   <xs:documentation>See http://www.w3.org/TR/xmlbase/ for
107                     information about this attribute.</xs:documentation>
108  </xs:annotation>
109 </xs:attribute>
110
111 <xs:attributeGroup name="specialAttrs">
112  <xs:attribute ref="xml:base"/>
113  <xs:attribute ref="xml:lang"/>
114  <xs:attribute ref="xml:space"/>
115 </xs:attributeGroup>
116
117</xs:schema>
118