Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/xmltest/valid/sa/out/044.xml
<doc> <e a1="v1" a2="v2" a3="v3"></e> <e a1="w1" a2="v2"></e> <e a1="v1" a2="w2" a3="v3"></e> </doc>