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Variable in XPath

Subject: Variable in XPath
From: Garvin Riensche <g.riensche@xxxxxxx>
Date: Wed, 27 Jun 2007 16:47:50 +0200
 Variable in XPath

I hope that anyone can help me with the following. I want to write a stylesheet that is used to check if an element (class) with a special ID which is given as variable from the commandline exists in the source or not. If no variable is supplied I want to test if there are "class" nodes at all. Of course it's no problem to check if a node with a special ID exists or not. But what do I use as default value of the variable so that all "class" nodes are selected if no variable is supplied.

(not working) example:
  <class id="2" owner="1" name="A"/>
  <class id="3" owner="1" name="B"/>


<xsl:variable name="id" select="attribute::*"/>

<xsl:template match="//condition/and-condition">
<xsl:when test="doc('factbase.xml')/facts/class[@id eq $id]">

The test should be true if $id is set to "2" or "3" and if $id is not set at all. So, the key is the comparison "@id eq $id" and the default value of $id. "attribute::*" as default value is obviously wrong. Which default value do I have to use to test if class nodes exist at all?


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