Sure, this is what the namespace axis is for.

<xsl:value-of select="namespace::*[name()=$prefix]"/>

Michael Kay
Software AG
home: Michael.H.Kay@xxxxxxxxxxxx
work: Michael.Kay@xxxxxxxxxxxxxx 

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Christopher Dix
> Sent: 15 July 2002 13:59
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  Prefix -> Namespace Resolution
> 
> 
> Is there a way to determine the namespace URI associated with 
> a given prefix while processing a document?  I realize that 
> namespace-uri will give me the URI if I have an element.  In 
> my case, I have an attribute value that is a Qname, and I 
> need to determine what the URI is for that value.  For example:
> 
> <doc xmlns:x="http://someuri.org/">
> 	<foo myAttribute="x:myVal"/>
> </doc>
> 
> In the course of processing, I will discover the value of 
> myAttribute for element foo, and I need to determine the 
> namespace URI associated with prefix x.  I appreciate any 
> help you can give me.
> 
> Thanks,
> Chris Dix
> 
> 
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