[xsl] How to sort a nodeset referenced by a variable?

Hi,

Is it possible to sort a variable containing a nodeset?
I define a variable which contains a filterd nodeset. Then I want to sort
the nodeset referenced by this variable. 

I am doing something like this

<xsl:variable name="filterdNode" select="//*" />

<xsl:variable name="sortedList">
<xsl:for-each select="$filterNode/someElement">
 <xsl:sort select="$fileterNode/secondElement">
 <xsl:copy-of select="."/>
</xsl:for-each>
</xsl:variable>

<xsl:copy-of select="xalan:nodeset($sortedList)" />


But the node set is not getting sorted.
Am I doing something wrong here?

Thanks,
Shailendra


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