I'm trying to match SERVICED from the SecondStruct structure with that of
the FirstStruct structure and print out messageOne if the SERVSTAT="Y". If
there is no matching SERVICEID in FirstStruct, print out messageTwo. For
example, my output could look like this:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
	<xsl:key name="kStat" match="Structure[@StructId='FirstStruct']/Row" use="@SERVICEID"/>
	<xsl:template match="root">
		<xsl:apply-templates/>
	</xsl:template>
	<xsl:template match="Structure"/>
	<xsl:template match="Structure[@StructId='SecondStruct']">
		<xsl:apply-templates/>
	</xsl:template>
	<xsl:template match="Row">
		<xsl:value-of select="@SERVICEID"/>
		<xsl:text>	</xsl:text>
		<xsl:choose>
			<xsl:when test="key('kStat', @SERVICEID)/@SERVSTAT = 'Y'">On</xsl:when>
			<xsl:otherwise>Off</xsl:otherwise>
		</xsl:choose>
		<xsl:text>&#xD;</xsl:text>
	</xsl:template>
</xsl:stylesheet>

--
Oleg Tkachenko
Multiconn International, Israel