Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/sun/invalid/not-sa07.xml
<?xml version='1.0' standalone='yes'?> <!DOCTYPE attributes SYSTEM "../valid/sa.dtd" [ <!-- NMTOKEN needs normalization --> ]> <attributes token = "b" nmtoken = " this-gets-normalized " />