| <!DOCTYPE book [ | |
| <!ELEMENT book (doc*)> | |
| <!ELEMENT doc (isid*)> | |
| <!ELEMENT isid EMPTY> | |
| <!ATTLIST isid myid ID #IMPLIED> | |
| ]> | |
| <book> | |
| <doc> | |
| <isid myid="mine"/> | |
| <isid myid="dup"/> | |
| </doc> | |
| <!-- including another XML document with IDs --> | |
| <xinclude:include xmlns:xinclude="http://www.w3.org/2001/XInclude" | |
| href="../ents/ids.xml"/> | |
| </book> |