Validate XPath on variable

[alk]

Hi,

can anybody tell me if something like the following is possible? I'm reading the content of an XML-file into a variable and would like to validate if an XPath expression which is defined in the context actually matches a node within the variable's temporary tree.

Code: Select all

<xsl:template name="ValidateXPath">

 <xsl:param name="root"/>

  <xsl:for-each select="$root/msg:Entry">

   <xsl:variable name="SrcFile" select="concat( '../xml/' , msg:InputFile)"/>

   <xsl:variable name="SrcContent">

    <xsl:copy-of select="document($SrcFile)/child::*[1]"/>

   </xsl:variable>

   <xsl:for-each select="msg:Values/msg:Value">

    <xsl:if test="not($SrcContent[msg:XPathExpr])">

     <xsl:message >No Match: </xsl:message>

     <xsl:message select="msg:XPathExpr"/>

    </xsl:if>

   </xsl:for-each>

  </xsl:for-each>

</xsl:template>

$srcContent contains the expected data und XPathExpr contains an XPath that, if applied to the document, would find a match. Nevertheless if combined as above it's just not working.

Any help is truly appreciated.

Cheers,
Alex