Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/oasis/p08pass1.xml
<!DOCTYPE doc [ <!ELEMENT doc (A*)> <!ELEMENT A EMPTY> <!ATTLIST A att NMTOKENS #IMPLIED> ]> <doc> <A att="abc"/><A att="abc def . :"/><A att=" abc def "/> </doc>
