Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/not-wf/P05/ibm05n02.xml
<!DOCTYPE -A_name_starts_With- [ <!ELEMENT -A_name_starts_With- EMPTY> ]> <-A_name_starts_With-/>