Re: [xml-dev] Any API for required/optional from an XSD?

[Adam Flinton <adam.flinton@nhs.net>]

Michael Kay wrote:
>> I need to interrogate/process an element within a xsd/schema
>> & simply ask "what are my required child nodes (elements &
>> attributes)" & then "what are my optional child nodes
>> (elements & attributes)"
>>
>> Is there an api (preferably java) or an XSLT sheet which
>> would provide this information?
>>
>>
>
> There's no standard API. Both Xerces and Saxon offer their own APIs to the
> compiled schema component model.
>
> It's pretty hard to do with XSLT because the translation from a schema
> document to a schema component model involves expansion of model groups and
> named attribute groups, an understanding of type derivation by extension and
> restriction, and understanding of substitution groups.
>
> Saxon allows you to export the schema component model in an XML
> representation, in a form which makes it fairly easy to extract this
> information.
>
>
A) Is this the Saxon-SA or saxon-B?

B) Any code / tutorial showing how to take in a schema & output the XML
document?

If saxon-B then I will try & wrap it in an ant task which I'll post in
the OSS world somewhere.

Adam


> Regards,
>
> Michael Kay
> http://www.saxonica.com/
> http://twitter.com/michaelhkay
>
>
>


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