Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/xml-1.1/valid/P77/ibm77v09.dtd
<?xml version='1.1' encoding='UTF-8'?> <![INCLUDE [ <!ELEMENT 更node EMPTY> <!ELEMENT root ANY> ]]>