>  From : Rick Jelliffe [mailto:ricko@[...].au]
> 
>  [...]I had the experience of being *very* familiar with the XML Schema specs,
>  then going away for a few months.  When I returned, I found them quite
>  difficult to fathom.  There have been several times when I have not been
>  able to answer user's (of our validator) questions and have had to rely on
>  another Schema expert here.

You see, I just never could grab XML Schemas (final) specs overall - and thus, a
fortiori, could not feel sufficiently confident to practice it/implement it -
because of my (incomplete) understanding of it - in spite of much efforts,
believe me.

I can imagine I am not the only one in such a case; but note: this is *not* true
of RELAX NG, for which I pay more and more attention for relatively little time
(a few months) and nevertheless find more and more: complete, elegant,
practical, reliable, etc.

In particular, believe it or not, this helped me a lot in understanding how
RELAX NG implementations are supposed to behave (or, more precisely, give output
to):

http://www.oasis-open.org/committees/relax-ng/proofsystem.html

Can anyone gimme pointers to an XML Schemas-equivalent, with size in same order
of magnitude as for RELAX NG - thanx in advance?

>  [...]But then you cannot use subsititution groups:  this is the kind of
complexity
>  that James is talking about I think--the complexity when using one
>  feature makes another disappear arbitrarily.

+1 for me: effectively the kind of situation that frightens me a lot when it
comes to rely on the interpretation/evaluation of formalisms by machines...

>  [...]
>  But it is not James who is being black and white: it is the draft RFC
>  wanting to
>  ban the use of RELAX NG! (and, Schematron or the DSDL effort for that matter!)

... and that's exactly the way I felt that draft "opinion" - and actually, at
the very first reading, you know.

Regards,
Cyril


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