sp wrote:



final doc, which is just a new version of doc1:




<doc1>



<a>
 <a1></a1>
 <a2></a2>
 <!-- etc -->
</a>

<b>
 <b1></b1>
 <b2></b2>
 <!--etc -->
</b>

<c>
 <c1>more recent stuff</c1>
 <c2>more recent stuff</c2>
 <!--etc -->
</c>

<d> new element not in doc1 </d>



</doc1>

Here is a sample XSLT 2.0 stylesheet that does the job with Saxon 9 and 
the XML input samples you provided:



<xsl:stylesheet
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="2.0">

  <xsl:output indent="yes"/>



  <xsl:param name="url2" select="'test2009050404.xml'"/>
  <xsl:variable name="d2" select="document($url2)"/>

  <xsl:template match="/*">

    <xsl:copy>

      <xsl:apply-templates select="@*"/>

      <xsl:apply-templates select="*"/>

      <xsl:copy-of select="$d2/*/*[not(some $c in current()/* satisfies 
(node-name(.) eq node-name($c)))]"/>

    </xsl:copy>

  </xsl:template>



  <xsl:template match="/*/*">

    <xsl:copy>

      <xsl:copy-of select="*[not(some $c in $d2/*/*[node-name(.) eq 
node-name(current())]/* satisfies (node-name(.) eq node-name($c)))]"/>

      <xsl:copy-of select="$d2/*/*[node-name(.) eq 
node-name(current())]/*"/>

    </xsl:copy>

  </xsl:template>



</xsl:stylesheet>




--



	Martin Honnen
	http://msmvps.com/blogs/martin_honnen/