> > the "x"-concept [...] in the context of CQL.
> It doesn't make sense to me.
I would be pleased to discuss this further within the context of a list
about CQL or another query related list. Of course, we could extend EDTF
with a fourth level (level three) for questions connecting EDTF to query
languages, but I suggest to place this discussion within phase two of the
EDTF specification, as for my suggestion about reliability and