Hi Felix,
> The rules file with rules or explanations - as applicable - for all data categories is now here
> https://tools.oasis-open.org/version-control/browse/wsvn/xliff/trunk/xliff-21/schemas/its-rules.xml
It seems two selector values in the its-rules.xml file are missing a closing ']':
<!-- Rules for Terminology -->
<its:termRule selector="//xlf2:mrk[@type='term' and @ref" termInfoRefPointer="@ref"/>
<!-- Rules for Language Information -->
<its:langRule selector="//xlf2:*[@xml:lang" langPointer="@xml:lang"/>
Cheers,
-yves