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RE: [xml-dev] XML Schema and the Unique Particle Attribution (UPA) rule

From: "Klotz, Leigh" <Leigh.Klotz@...>
To: "Azariah Jeyakumar" <ajeyakumar@...>, <xml-dev@...>
Date: Fri, 10 Aug 2007 14:38:36 -0700

Or use RNG ;-)

http://books.xmlschemata.org/relaxng/relax-CHP-7-SECT-2.html [Erik van der Vlist, why you should]

http://www.simonstl.com/articles/sanity/relaxngSchema.html [Simon St. Laurent, why you can't]

http://www.xml.com/pub/a/2004/02/11/relaxtron.html [Eddie Robertsson, what it doesn't do]

Leigh.

From: Michael Kay [mailto:mike@...]
Sent: Friday, August 10, 2007 2:32 PM
To: 'Azariah Jeyakumar'; xml-dev@...
Subject: RE: [xml-dev] XML Schema and the Unique Particle Attribution (UPA) rule

This is a feature often requested in XML Schema called "cooccurrence constraints". It can't be done in XML Schema 1.0, unless you are prepared to change your <type> element into an xsi:type attribute. It will be possible in XML Schema 1.1, but that's still in the future.

Michael Kay

http://www.saxonica.com/

...

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