samples/data/org/apache/xml/security/temp/id2.xml

<?xml version="1.0"?>
<!DOCTYPE doc [
<!ATTLIST e9 Id ID #IMPLIED>
]>
<doc>
   <!-- A comment -->
   <e9 Id='N3'><!-- A comment -->Das N3 Element</e9>
   <e9 Id='id2'><!-- A comment --> Das id2 Element</e9>
</doc>