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This is not possible with W3C Schema - we normally refer to this
requirement as "co-occurrence constraints". This may be more than what
you need, but you could express these requirements as classes in RDF or
OWL (where a wife could be a subclass of female, for example).
Schematron will allow you to do this, however, and someone will most
likely be along soon to tell you how.
Kind Regards,
Joe Chiusano
Booz | Allen | Hamilton
Strategy and Technology Consultants to the World
Pedro Salazar wrote:
>
> Greetings,
>
> I'm creating a schema file but by several times I feel the needed of
> something to validate my sub-elements in tree (children elements)
> subordinated to an attribute value on the parent element.
>
> Is it possible to validate this with the schema semantics?
>
> For instance, a schema may define an element called "human" that would
> allow to have a <wife> or <husband> element below it. However, I would
> like to apply an extra semantic rule that would only allow the <wife>
> element be inside a human of gender type "female", and the same thing
> for <husband> with "male". Is it possible?
>
> <human gender="female">
> <wife />
> </human>
>
> <human gender="male">
> <husband />
> </human>
>
> thanks,
> Pedro Salazar.
> --
> PS
> pedro-b-salazar_at_ptinovacao_dot_pt
> PGP:0E129E31D803BC61
>
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