[xsl] Finding attribute of a 'grand-parent'

Subject: [xsl] Finding attribute of a 'grand-parent'
From: Christian Cäsar <caesar@xxxxxxxxxxxx>
Date: Tue, 17 Jul 2001 16:09:49 +0200
Hello list,

I'm stuck again. As always I hope this is not a case of RTFM. Consider this

<po id="1">
  <po id="2">
      <po id="3">
    <po id="4">

For the element <po id="3"> I'd like to get the id attribute from the
ancestor that is a po Element (in this case, '2'). 
What I got with 'ancestor::po' was '1', the attribute from the 'eldest'
ancestor. 'parent::po' returns nothing, because obviously it isn't the
parent i am seeking. More like the grand-parent, so to speak. 

In other words: I'm looking for the nearest ancestor relative who is not a
parent. And I don't want uncles, either... ;-)

Changing the xml-structure is not an option, unfortunately.

Any hints?

Thank you,

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