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Re: Can XML Schemas do this?

• To: XML DEV <xml-dev@l...>
• Subject: Re: Can XML Schemas do this?
• From: Eric van der Vlist <vdv@d...>
• Date: 20 Jan 2003 15:54:07 +0100
• In-reply-to: <1043073881.11126.1.camel@m...>
• Organization: Dyomedea (http://dyomedea.com)
• References: <1043073881.11126.1.camel@m...>

On Mon, 2003-01-20 at 15:44, Brian Burridge wrote:
> I have an xml document, where we want elements to be able to appear in
> any order. Some are required, others aren't. And in many cases if you
> have tag A then you don't need tag B, and vice versa.
> 
> Problem is, I need to use the ALL tag and have choices and groups within
> it, but you can't.
> 
> Is there a way around this?

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.

Hope this helps.

Eric
-- 
Did you know it? Python has now a Relax NG (partial) implementation.
                                          http://advogato.org/proj/xvif/
------------------------------------------------------------------------
Eric van der Vlist       http://xmlfr.org            http://dyomedea.com
(W3C) XML Schema ISBN:0-596-00252-1 http://oreilly.com/catalog/xmlschema
------------------------------------------------------------------------

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