RE: [xsl] Can XPath / XSLT be aware of XML Schema content models grouping i nformation ?

[Jerome Louvel <Jerome dot Louvel at Metaserver dot com>]

Thanks Jeni for your comments. 

In fact this is more an hypothetical problem that we may encounter than a
real world requirement.

However after reading the article on James Clark in DDJ "A Triumph of
Simplicity: James Clark on Markup Languages and XML"
http://www.ddj.com/documents/s=862/ddj0107e/0107e.htm I'm now wondering if
this inclusion in XPath/XSLT 2.0 would be a good thing, especially if you
consider XML Schema as just one way to constrain / validate an XML document
compared to Relax NG, Schematron, XDR, .... 

Regards,

Jerome Louvel



-----Original Message-----
From: Jeni Tennison [mailto:jeni@jenitennison.com]
Sent: Friday, November 09, 2001 5:34 AM
To: Jerome Louvel
Cc: Xsl-List (E-mail)
Subject: Re: [xsl] Can XPath / XSLT be aware of XML Schema content
models grouping i nformation ?


Hi Jerome,

> Is there any way (or plan in XPath 2.0 / XSLT 2.0) to "address" /
> "select", for example, the occurences of element A that are part of
> the 3rd occurence of the second group which itself is part of the
> 2nd occurence of the containing sequence (if this occurences exists)
> ?

There's certainly not in XSLT 1.0. For XPath/XSLT 2.0 to support it,
the XQuery/XPath data model would have to include model groups. The
only schema components that it does so far (see the WD at
http://www.w3.org/TR/query-datamodel/#types) seems to be
element/attribute declarations and simple/complex types. So it doesn't
look as though there's a plan to have this support at present.

But you should bring it up to the XQuery/XPath editors
(www-xml-query-comments@w3.org). The schema support in XPath/XSLT
should reflect real world requirements, and if you've got one, then
you should make your case!

Cheers,

Jeni

---
Jeni Tennison
http://www.jenitennison.com/

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