Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/valid/P62/ibm62v05.dtd
<?xml version="1.0" encoding='UTF-8'?> <!-- DTD for Production 62--> <![INCLUDE[ ]]> <!--Positive test with pattern5 of P62--> <!--Missing external subset declaration which is o.k.-->