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"Chris Hoehn" <chris@hellohawaii.com> writes:
> I've got two schemas, A & B, that each define an element named EltC. A and
> B both use the same targetNamespace. A and C are both defined by a
> "standards body" so I do not want to modify their definitions.
>
> If I want to create another schema, Z, which aggregates A & B (i.e. A & B
> are children in Z), I have the problem of a duplicate definition of EltC. I
> have, to this point, tried creating Z by <include> or <import> of A & B.
> Both of which give the problem of a duplicate definition. This seems so be
> an issue of polymorphism to me.
>
> My question is... how can I properly <import> (or <include>) A & B in Z such
> that there is not this definition conflict? Is this even possible if A & B
> have the same targetNamespace value?
Well, there's really nothing W3C XML Schema can do to help you.
You've got conflicting definitions, and the authors of A & B went out
of their way to make it impossible for you to fix the problem
non-intrusively.
To see why it's hard, think about what you want the _result_ (Z) to
validate for EltC instances, given the contradiction. Which one wins,
if either? The schema processor can't read your mind here, alas.
ht
--
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/
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