>From: "Watson, John" <JWatson@xxxxxxxxxxxxxxxxxxx>
>To: "'XSL-List@xxxxxxxxxxxxxxxxxxxxxx'" <XSL-List@xxxxxxxxxxxxxxxxxxxxxx>
>Subject: namespace prefixes and Xpath/XSLT
>Date: Mon, 7 Apr 2003 09:23:00 +0100



>Can anyone help me with this?  I am investigating the experimental DOM3
>XPath interface as implemented in Xalan-J 2.4.1, and how this plays with
>namespaces.
>
>If I have this document:
> 
><?xml version = "1.0"?>
><foo:a xmlns:foo = "urn:foo" xmlns = "urn:foo">
>   <b><c/></b>
></foo:a>
> 
>And I initialise the XPath Namespace (using XPathNSResolver) from the root
>element, so it is aware of foo and the default namespace,  the following
>XPath pattern finds a match:
> 
>/a/b/c
> 
>whereas any patterns containing namespace prefixes such as
> 
>/foo:a/foo:b/foo:c
> 
>or
> 
>/foo:a/b/c
> 
>do not find a match. This is the reverse of what I would have expected.
>Does this surprise anyone, or have I misunderstood namespaces anf how they
>are intended to work with XPath?  Or is it a Xalan bug? (incidentally, I
>seem to get the same behaviour using the proprietary XPathAPI interface.)
> 
>If, on the other hand, I use XPath expressions within match expressions in
>XSLT template rules, behaviour is that I always need to use the namespace
>prefix in the expression (even though I may have defined a default namespace
>in the sheet).  i.e. the reverse of the raw DOM XPath behaviour.  My
>understanding is that this is correct XSLT 1.0 behaviour, but may change in
>XSLT 2.0.  Is this correct?
> 
>Thanks in advance for any help!
> 
>John Watson
>
>
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