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RE: [xml-dev] Getting XSD annotation from matched element

I agree that directly processing XSD syntax representation is tricky and
complicated, and the alternative approach that introduces intermediate
representation such as the schema component model might be easier.
However, I have not been convinced that this is too complicated to do.
I found it's a rather intriguing practice. Of course, any solid
evidences, detailed advices would be greatly appreciated! 
I also think the restriction referred here should be able to be removed
by using the path to an instance node (instead of merely an instance
node) as a parameter. 


-----Original Message-----
From: Michael Kay [mailto:mike@saxonica.com] 
Sent: Friday, August 13, 2010 10:39 AM
To: xml-dev@lists.xml.org
Subject: Re: [xml-dev] Getting XSD annotation from matched element

On 13/08/2010 17:56, Xia Li wrote:
> You might take a look at this XSLT function library provided with this
> article,
> http://www.ibm.com/developerworks/library/x-schemanode/
> You will find a set of XSLT functions that would allow you to locate
> schema component (the element declaration/type definition) for a given
> instance node.
> Lisa

That's an amazingly ambitious library, thanks for the reference!

Unfortunately code that works directly from schema documents is usually 
wrong, at least in the sense that it cannot process arbitrary valid 
schemas. For example, the following restriction is documented, and rules

out many real schemas:

"The constraint of this algorithm is that a local element is not allowed

to be declared with the same name of a global element."

Michael Kay


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