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Re: dynamically extensible schema


advil studio
Chris, you're the man. I owe you an extra pack of advil (exchangeable to 
a mug of german beer)

thanks,
Christian

Chris Wilper wrote:
>>I have a question I am banging my head against.
>>(etc)
>>The special thing is that the potential number of ...
>>(etc)
> 
> 
> Hmm, try this: http://media.vermotion.com/media/4235/prodimages/Advil.jpg
> 
> then this: http://www.zvon.org/xxl/XMLSchemaTutorial/Output/ser_substitution_st0.html
> 
> Good luck,
> Chris
> 
> -----Original Message-----
> From: Christian Sell [mailto:christian.sell@n...]
> Sent: Friday, March 07, 2003 10:19 AM
> To: xml-dev@l...
> Subject:  dynamically extensible schema
> 
> 
> Hello,
> 
> I have a question I am banging my head against. I am looking for a way 
> to validate instances like the following:
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <dtw xmlns="core" xmlns:ext="extended">
> 
>      <echo message="this is a message"/>
> 
>      <ext:echo/>
> 
> </dtw>
> 
> The special thing is that the potential number of namespaces/schemas 
> appearing in instances (beyond the core schema) is undetermined, and I 
> therefore do not want to include a reference to the "extended" schema(s) 
> inside the "core" schema. Instead, I would like to have a definition in 
> the core schema that says something like:
> 
> "after the echo element, let there follow any number of elements from 
> any namespace whose type extends the type XY" (where XY would also be 
> defined in the core schema).
> 
> The only meachnism that I found in XML schema that comes close is the 
> xsd:any element, but that does not alow me to specify the derivation 
> constraint I mentioned above.
> 
> Does anyone have a hint?
> 
> thanks,
> Christian
> 
> 
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