[references] property fixup serious incompatibility

I note with dismay that the XInclude CR draft specifies a _different_
algorithm for computing the [references] property of attributes
from the Infoset REC itself.

The Infoset REC is clear that duplicate IDs are _not_ available as
referents, and so an IDREF to such an ID has no [references] property.

The XInclude CR draft follows XPath 1.0 (but note _not_ XPath 2.0) and
_does_ give such IDREFs a [references] property, pointing to the host
of the first of the conflicting IDs.

I think this is a _serious_ bug and that XInclude should be brought in
to line with the Infoset REC.

ht
-- 
  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2002, part-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
	    Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
		     URL: http://www.ltg.ed.ac.uk/~ht/
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