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RE: Can XML Schemas do this?

• To: "'Eric van der Vlist'" <vdv@d...>, XML DEV <xml-dev@l...>
• Subject: RE: Can XML Schemas do this?
• From: Jeff Lowery <Jeff.Lowery@c...>
• Date: Mon, 20 Jan 2003 10:33:46 -0800

> The three frequent workarounds for this issue are:
> 
> 1) Use another schema language (Relax NG does this very well) 
> instead of
> W3C XML Schema.
> 
> 2) Write a laxed schema with W3C XML Schema (most of the time using
> xs:choice/@maxOccurs="unbounded" instead of xs:all) and add Schematron
> rules to do the additional tests.
> 
> 3) Wrap all what's hurting W3C XML Schema into container 
> elements to fit
> all the restrictions of xs:all.


There's a fourth approach that I've seen:  
a) write the Schema using unbounded sequence models for the unordered
elements, 
b) perform primary validation of types against the raw schema
c) do a secondary validation of cardinality constraints as defined in
appinfo annotations in the Schema 

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