[xsl] Correct way to test for no match

[Dan Vint <dvint@xxxxxxxxx>]

I have a structure where I need to match values between w element 
attributes. These elements are in different parst of the document. Problem 
I'm trying to solve is when there is a typo in one of the attributes and 
there is no match. I thought this would do it, but it's not
<xsl:when 
test="ancestor::ipb/figure/subfig/graphic[@boardno=$sht_num]/@boardno">

same with this

<xsl:when 
test="ancestor::ipb/figure/subfig/graphic[@boardno=$sht_num]/@boardno = 
''">

Any suggestions?

Here is the doc structure:

<ipb>
  <figure>
    <subfig>
      <graphic boardno='a'/>
    </subfig>
  </figure>
  <table>
    <row>
      <entry><ipbilus><xref shtref='b'/></ipbilus>
      </entry>
    </row>
  </table>
</ipb>

$sht_num is set to xref/@shtref so b never finds a on graphic

..dan

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Danny Vint

Specializing in Panoramic Images of California and the West
http://www.dvint.com


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