<xsl:stylesheet
   version="1.0"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>

<xsl:output indent="yes"/>


<xsl:template match="/">
 <xsl:apply-templates mode="x" select="/">
  <xsl:with-param name="x" select="'manhattan'"/>
 </xsl:apply-templates>
</xsl:template>


<xsl:template mode="x" match="/|*">
<xsl:param name="x"/>
<xsl:copy>
<xsl:copy-of select="@*"/>
<xsl:if test="descendant-or-self::page[@name=$x]">
 <xsl:apply-templates mode="x" select="*">
  <xsl:with-param name="x" select="$x"/>
 </xsl:apply-templates>
</xsl:if>
</xsl:copy>
</xsl:template>



</xsl:stylesheet>


produces

$ saxon tree.xml  tree.xsl
<?xml version="1.0" encoding="utf-8"?>
<linkmap>
   <page name="index">
      <page name="about"/>
      <page name="events"/>
      <page name="contact">
         <page name="directions">
            <page name="new-york">
               <page name="manhattan">
                  <page name="uptown"/>
               </page>
               <page name="bronx"/>
            </page>
            <page name="paris"/>
         </page>
      </page>
   </page>
</linkmap>

David

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