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   Re: [xml-dev] conditions in xml schema

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K.R.Vaidyanathan wrote:

> Eg.. If element01 is present or element02 is present then element 03 should
> be present.
>       If either of ele01 or ele02 are present then the other is required

This is a co-occurrence constraint, which generally speaking
XML Schema cannot handle.  In RELAX NG (plug, plug), it's fairly

((element01 & element02?) | element02) & element03


John Cowan <jcowan@reutershealth.com>     http://www.reutershealth.com
I amar prestar aen, han mathon ne nen,    http://www.ccil.org/~cowan
han mathon ne chae, a han noston ne 'wilith.  --Galadriel, _LOTR:FOTR_


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