>> It is strongly recommended to use
>> xml:lang for <source> and <target> as well, so any XML tools (not just
>> XLIFF tools) can be language-aware.
>
>Why not make this required? Are there any applications that would be
>harmed by always having an xml:lang attribute specified on source/target
>elements? I argue that the converse is true and so would like to see
>xml:lang be a required attribute.
I think we didn't make required because you could avoid to have it for one
of the two language in the document by specifying the xml:lang at the
<xliff> level and it would be redundand. But my memory is fuzzy on that
topic. Other may recall the discussion we had on this.
-yves