Transclusions to XInclude mapping

Dave Pawson wrote:
> Thanks Jirka, great piece of work (and good intro to xInclude!).
> In summary, do you believe:
> a) xInclude isn't up to it

In short yes.

Actually if "de jure" conformance to XInclude is strong requirement, we
can introduce custom XPointer scheme which can be used to convey
transclusion specific metadata, something like: