Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/not-wf/P28/ibm28n01.xml
<?xml version="1.0" encoding='UTF-8'?> <!DOCTYPE SYSTEM "ibm28n01.dtd"> <!-- Name is missing in doctypedecl --> <animal/>