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On Jun 27, 2006, at 15:51, Chiusano Joseph wrote:
> Perhaps a reference to an attribute group, with a minOccurs and
> maxOccurs of 1?
Nope, you can't have those on an attribute group, and if you could I
guess you'd be setting the occurrences of the group, not of its
individual members.
I'm fairly certain that it can't be done in XML Schema, at least not
without a kludge like defining a type per attribute occurrence and
casting the element with xsi:type — yummy! I left the dark magic door
open because I never remember what a ·non-absent· {unfinal}
[attributes] mixed element-only {content [item]} post-schema-
validation-infoset-contribution used as a distinguished property
value denoting absence can really do, but I don't think it can be
done. Something about hitting the 20/80 sweet spot I think :)
--
Robin Berjon
Senior Research Scientist
Expway, http://expway.com/
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