Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/valid/P79/ibm79v01.xml
<?xml version="1.0"?> <!DOCTYPE book [ <!ELEMENT book ANY> <!ATTLIST notebook att CDATA #IMPLIED> <!ENTITY % epe SYSTEM "ibm79v01.ent" > %epe; ]> <book><name>XML Handbook</name> This is a book</book> <!-- a valid test case: test P79 -->
