1test/VC/dtds/doc.dtd:2: validity error : Element doc has too may ID attributes defined : val
2<!ATTLIST doc val ID #IMPLIED>
3                             ^
4test/VC/dtds/doc.dtd:2: validity error : Element doc has 2 ID attribute defined in the external subset : val
5<!ATTLIST doc val ID #IMPLIED>
6                             ^
7