XML/RSS - How to pass Atom link href to xsl variable

I have an XML...

<channel>
<atom:link href="http://www.mysite.com/rss/?m=look" rel="self" type="application/rss+xml"/>
<title></title>
<link>http://www.site.com/content/</link>
<pubDate>Fri, 06 Apr 2012 19:28:44 CDT</pubDate>
<lastBuildDate>Fri, 06 Apr 2012 19:28:44 CDT</lastBuildDate>
<ttl>5</ttl> 

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How to I pass the Atom link href (http://www.mysite.com/rss/?m=look) to the xsl variable below?

<xsl:variable name="thisurl" select="ATOM_HREF_LINK_HERE"/>

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is that possible?
dimsoupleAsked:
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Geert BormansConnect With a Mentor Information ArchitectCommented:
<xsl:variable name="thisurl" select="/channel/atom:link/@href"/>

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make sure you bind the atom namespace to the correct namespace uri
and that you have the variable in context

there is way too little context in this question to be more detailed
It is not whole of the XML source (the atom: namespace binding is missing)
and we don't know wheiter you need a global variable, wheither there is more than one channel in your atom and hat the context of the variable is.

But in general, the above should be it
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dimsoupleAuthor Commented:
A siample RSS feed is @
http://www.martellyhaiti.com/rss/?m=messages

The stylesheet is @
http://www.martellyhaiti.com/rss/rss.xsl

It works fine if I set:
<xsl:variable name="thisurl" select="'http://www.martellyhaiti.com/rss?m=messages'"/>

If I change it to:
<xsl:variable name="thisurl" select="/channel/atom:link/@href"/>

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The rss page shows a blank page. What I am doing wrong?
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Geert BormansInformation ArchitectCommented:
as I said...
make sure you bind the atom namespace to the correct namespace uri

make this your stylesheet element and it will work

<xsl:stylesheet version="1.1" 
	xmlns:atom="http://www.w3.org/2005/Atom" 
	xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

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Note that in general it is not a good idea to use the stylesheet version 1.1
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