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Re: Restricting substitution groups?

From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
Date: 14 Feb 2002 11:31:29 +0000
To: Eric van der Vlist <vdv@dyomedea.com>
Cc: xmlschema-dev@w3.org, www-xml-schema-comments@w3.org
Message-ID: <f5bheokmh9q.fsf@cogsci.ed.ac.uk>
Eric van der Vlist <vdv@dyomedea.com> writes:

> As mentioned by Jeni and Noah in their answers, it would be nice to
> get a definitive answer and you are probably the only one who can give
> it :) !
> Untill we get such an answer, my position is that since the result of
> this restriction relies on something (the order of elements in a
> substitution group) which is undefined, restriction of substitution
> groups are themselves undefined and should be avoided as source of
> potential interroperability issues.


> >>Does that mean that we can restrict substitution groups?


The REC is underspecified in the area of the order of the implicit
choice represented by a substitution group head.  I think an erratum
is in order, as Martin Gudgin suggested, clarifying that in this case
the order constraint doesn't apply.

  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2001, 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/
Received on Thursday, 14 February 2002 06:40:01 UTC

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