test/VC/dtds/doc.dtd:2: validity error : Element doc has too may ID attributes defined : val
<!ATTLIST doc val ID #IMPLIED>
                             ^
./test/VC/OneID3:0: validity error : Element doc has too many ID attributes defined : val
test/VC/dtds/doc.dtd:2: validity error : Element doc has 2 ID attribute defined in the external subset : val
<!ATTLIST doc val ID #IMPLIED>
                             ^