Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/9x9/XmlLang04F.xml
<doc ><eg:inner eg:a2="a2" ><eg:deeper eg:a3="a3" ><eg:evendeeper/></eg:deeper ><eg:anotherdeeper ><eg:evendeeper/></eg:anotherdeeper></eg:inner></doc>