At this moment we have 2 approved features in the wiki that should live in
their own modules: translation candidates and glossaries.
We need 3 XML schemas and one catalog for representing the core plus the 2
modules if we keep module definitions in their own schemas. When a module
uses elements from the core (that's the case with translation candidates),
we have circular references between the schemas and that's nasty.
If we merge all three schemas and keep separate namespaces, we get rid of
the catalog and validation of XLIFF 2.0 documents will be much easier.
With a unified schema we can still have each optional module living in its
own namespace. Tools that only support core features would be able to work
with the main namespace, ignoring all others without suffering validation
There are two other aspects to consider:
- Maintenance will be easier
- We don't get criticism for having multiple schemas as was the
case with XLIFF 1.2