[xsl] Outputing a node whose value appears only once

Subject: [xsl] Outputing a node whose value appears only once
From: Jonathan Marenus <jonathanmarenus@xxxxxxxxx>
Date: Mon, 18 Jul 2005 15:34:57 -0700 (PDT)
What I would like to do now is output a value that
appears only once throughout the XML file. For
example, if I have:

<a>
   <b>value1</b>
   <bb>value2</bb>
   <bbb>value3</bbb>
</a>
<c>
   <b>value1</b>
   <bb>value2</bb>
   <bbb>value4</bbb>
</c>

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