Question about predicate

Hi

I didn't wrote a stylesheet since quite a long time and I am completely
rusted. Since this morning I am trying to match certain templates without
success. 
I want to do:
 <xsl:apply-templates select="//rdf:description[@about="the unknown
expression here."]" /> my problem is with the second part of the equation
("the unknown expression here"). I want it to match with any rdf:description
element having its attribute "about" equal to the value of ./@xlink:href
(the currently matched node having an xlink:href attribute). I tried
different expressions without success. Any help on that will be greatly
appreciated.

Many thanks
Didier PH Martin


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