XSLT 2.0

Is there a better way to try and find a unique attribute in a very large XML document? My unique attribute is an HL7 OID of 2.16.840.1.113883.10.20.1.12. The XSLT is not allowing me to identify the OID and then render all element under the OID and nothing else. There are several componet and section elements with the only unique identifier being the OID seperating the different sections. To parse the sections out and capture only the elements needed I am attempting to use a IF statement of:

<xsl:for-each select="/n1:ClinicalDocument/n1:component/n1:structuredBody/n1:component/n1:section/n1:entry/n1:procedure">
     <xsl:sort select="./n1:component/n1:section/n1:entry/n1:procedure/n1:effectiveTime/n1:low/@value" order="descending"/>
    <xsl:if test="//n1:templateId[@root='2.16.840.1.113883.10.20.1.12']">

    <tr>

    <td width='10%' align='left' valign="top">
    <xsl:call-template name="formatDate">
    <xsl:with-param name="date" select="./n1:effectiveTime/n1:low/@value"/>
    </xsl:call-template></td>


    <td width='30%' align='left' valign="top"><xsl:value-of select="./n1:code/@displayName"/></td>
    </tr>

    </xsl:if>
    </xsl:for-each>
    </table>

XML CODE

<component>
        <section>
         <templateId root="2.16.840.1.113883.10.20.1.12" />
        
         <code code="47519-4" displayName="History of procedures" codeSystem="2.16.840.1.113883.6.1" codeSystemName="LOINC" />
         <title>Procedures</title>
         <text></text>
         <entry typeCode="DRIV">
            <procedure classCode="PROC" moodCode="EVN">
            
             <templateId root="2.16.840.1.113883.10.20.1.29" />
             <id root="e401f340-7be2-11db-9fe1-0800200c9a66" />
            
             <code code="71861002" displayName="Implantation" codeSystem="2.16.840.1.113883.6.96" codeSystemName="SNOMED CT">
<originalText>
                 <reference value="#proc-1" />
</originalText>
</code>
</section>
</component>

Your code

<xsl:if test="//n1:templateId[@root='2.16.840.1.113883.10.20.1.12']">

says "if there is a templateId with this value of @root somewhere in the document, then do this processing, otherwise do nothing." This has little resemblance to your English-language statement of the problem "render all element under the OID and nothing else".

I'm guessing wildly, but I suspect you might want

<xsl:for-each select="/n1:ClinicalDocument/n1:component/n1:structuredBody/n1:component/n1:section[n1:templateId/@root='2.16.840.1.113883.10.20.1.12']/n1:entry/n1:procedure">

Though I suspect that's still not quite right - the sort key doesn't bear much relationship to your input, and I don't see where n1:effectiveTime is supposed to come from.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference