Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/valid/P61/ibm61v01.dtd
<?xml version="1.0" encoding='UTF-8'?> <!-- DTD for Production 61--> <![INCLUDE[ <!ELEMENT tiger EMPTY> <!ELEMENT animal ANY> ]]>
