sort with using document()

Hi all,

I'd like to sort result by an element which is in an included xml with using document(). I did it this way...

<xsl:for-each select="tech[tech]">
	<xsl:variable name="current-tech" select="@descr"/> 
	<xsl:value-of select="$current-tech" />
	<xsl:apply-templates select="document('css_report.xml')//item[metadata/technology=$current-tech]" mode="report" />
</xsl:for-each>

<xsl:template match="item" mode="report">
	<xsl:sort select="content/company"/>
	<xsl:value-of select="content/company"/><br/>
</xsl:template>


Does anyone know how to sort with using document()? Your help is appreciated.


thanks,
Fei



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