[no subject]

<Document>
  <Legend>
	<TypeDesc Type="PP" Id="1" PKey="ZZ" xml:lang="EN" ShDes="ZZ"
LongDes="ZO Contracts"/>
  </Legend>
</Document>

Requirement: To find LongDes

Exising XSL file:

<xsl:call-template name="getLegend">
	<xsl:with-param name="cat" select="'PP'"/>
	<xsl:with-param name="key" select="'ZZ'"/>
</xsl:call-template>

<xsl:template name="getLegend">
	<xsl:param name="cat"/>
	<xsl:param name="key"/>
	<xsl:call-template name="lookup">
		<xsl:with-param name="index" select="'legendIndex'"/>
		<xsl:with-param name="key"
select="concat($cat,'_',$key)"/>
		<xsl:with-param name="doc" select="$legend"/>
		<xsl:with-param name="expr" select="'@LongDes'"/>
	</xsl:call-template>
</xsl:template>

<xsl:template name="lookup">
	<!-- index name, i.e. name of the key -->
	<xsl:param name="index"/>
	<xsl:param name="key"/>
	<!-- default value -->
	<xsl:param name="default" select="''"/>
	<!-- node in index source document, per default default value
-->
	<xsl:param name="doc" select="$default"/>
	<!--expr to evaluate to return value, per default result node
-->
	<xsl:param name="expr" select="'.'"/>
	<!-- force context to document where the lookup table is -->
	<xsl:for-each select="$doc[1]">
		<xsl:variable name="result" select="key($index,$key)"/>
		<xsl:choose>
			<xsl:when test="$result">
				<xsl:value-of
select="xalan:evaluate(concat('$result[1]/',$expr))"/>
			</xsl:when>
			<xsl:when test="$default">
				<xsl:value-of select="$default"/>
			</xsl:when>
		</xsl:choose>
	</xsl:for-each>
</xsl:template>