XLIFF 21 csprd02: Empty srcLang/trgLang

Hello,

sorry for sending a comment after the review closed.

When editing an XLIFF file by hand I realized that file

<xliff version="2.1" xmlns="urn:oasis:names:tc:xliff:document:2.0" srcLang="" trgLang="">
    <file id="f1">
        <unit id="u1">
            <segment id="s1">
                <source>test</source>
                <target>test</target>
            </segment>
        </unit>
    </file>
</xliff>

does not report any error when validated against schemas. Note the *srcLang="" trgLang=""*.

The root cause seems to be in xliff_core_2.0.xsd:
<xs:attribute name="srcLang" use="required"/>
<xs:attribute name="trgLang" use="optional"/>

where type is not defined.

Could you please have a look?

Thanks,

Jan