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Re: Trying to Understand Complex Abstract Types: How To Define?

From: Henry S. Thompson <ht@inf.ed.ac.uk>
Date: Tue, 22 Mar 2005 10:28:34 +0000
To: Eliot Kimber <ekimber@innodata-isogen.com>
Cc: xml-schema-dev <xmlschema-dev@w3.org>
Message-ID: <f5br7i82cvh.fsf@erasmus.inf.ed.ac.uk>

You're on the right track as far as I can see, although your use of
xsi:type if meant literally is probably not what you want.

In particular, in the absence of content models expressed in terms of
types alone, use abstract elements and substitution groups.

George Bina's reply gives a good example of how this would look.

If you want to constrain the specialisztions to be restrictions
(resp. extensions), include final='extension' (resp. 'restriction') in
your type definition for InformationModule.

 Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
                     Half-time member of W3C Team
    2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
            Fax: (44) 131 650-4587, e-mail: ht@inf.ed.ac.uk
                   URL: http://www.ltg.ed.ac.uk/~ht/
[mail really from me _always_ has this .sig -- mail without it is forged spam]
Received on Tuesday, 22 March 2005 10:28:43 UTC

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