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test if node-set variable is empty

2004-12-14 08:00:42
How can I test if the variable $xsd_node was assigned a value?
In some cases the node-set expression to fill this variable might copy
nothing.

...     
<xsl:variable name="xsd_node">
  <xsl:copy-of select="$xsd_doc//xs:element[(_at_)name = $name and
count(child::node()) = 0]"/>
</xsl:variable>

<xsl:if test="???">
...

Is there something like empty($xsd_node)?

Cheers,

R.

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