Hi,
I want to merge a node from one xml document to another as per solution given by Michael as follows

<xsl:template match="/">
<services>
  <xsl:copy-of select="/services/service"/>
  <xsl:copy-of select="document('file2.xml')/services/service"/>
</services>
</xsl:template>


but implementing this I am able to copy the complete file but not specific xml Node.

<xsl:copy-of select="document('file2.xml')/*"/>
after this statement I can able to add a complete file
 but when I use <xsl:copy-of select="document('file2.xml')/services/service"/>
I am not able to add services/service node in to file1.xml

You need to show what your input files were, what result you obtained, and what result you wanted.

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

Input files are

File 1:
<?xml version="1.0" encoding="iso-8859-1" ?><confirmationDocument xmlns="http://schema.umbrella.ch/UmbrellaB2B/uB2B_Confirmation" xmlns:xsi="http://www.w3.org/2001/XMLSchema" origin="Galileo" type="Unticketed" id="1" creationDate="2006-02-16" modifyDate="2006-02-16" modifyTime="08:23:00">
<participants>
<participant participantNr="1">
<name>Mueller</name>
<firstname>Markus</firstname>
</participant>
</participants>
<services>
<service xmlns="" xsi:type="SrvcFlight" id="0">
<flightno>1233</flightno>
<flightCode>A34</flightCode>
</service>
</services>
</confirmationDocument>

File 2:
<?xml version="1.0" encoding="iso-8859-1" ?><confirmationDocument xmlns="http://schema.umbrella.ch/UmbrellaB2B/uB2B_Confirmation" xmlns:xsi="http://www.w3.org/2001/XMLSchema" origin="Galileo" type="Unticketed" id="1" creationDate="2006-02-16" modifyDate="2006-02-16" modifyTime="08:23:00">
<participants>
<participant participantNr="1">
<name>Mueller</name>
<firstname>Markus</firstname>
</participant>
</participants>
<services>
<service xmlns="" xsi:type="SrvcCar" id="1">
<carno>1233</carno>
<carProvider>AVIS</carProvider>
</service>
</services>
</confirmationDocument>

Expected Output:
<?xml version="1.0" encoding="iso-8859-1" ?><confirmationDocument xmlns="http://schema.umbrella.ch/UmbrellaB2B/uB2B_Confirmation" xmlns:xsi="http://www.w3.org/2001/XMLSchema" origin="Galileo" type="Unticketed" id="1" creationDate="2006-02-16" modifyDate="2006-02-16" modifyTime="08:23:00">
<participants>
<participant participantNr="1">
<name>Mueller</name>
<firstname>Markus</firstname>
</participant>
</participants>
<services>
<service xmlns="" xsi:type="SrvcFlight" id="0">
<flightno>1233</flightno>
<flightCode>A34</flightCode>
</service>
<service xmlns="" xsi:type="SrvcCar" id="1">
<carno>1233</carno>
<carProvider>AVIS</carProvider>
</service>
</services>
</confirmationDocument>


There may be any no of service in both the files.

Looks something like this:

<xsl:stylesheet... xmlns:c="http://schema.umbrella.ch/UmbrellaB2B/uB2B_Confirmation">

<xsl:template match="c:confirmationDocument">
  <xsl:copy>
    <xsl:copy-of select="@*"/>
    <xsl:copy-of select="c:participants"/>
    <services>
     <xsl:copy-of select="c:services/service"/>
     <xsl:copy-of select="document('2.xml')/c:confirmationDocument/c:services/service"/>
    </services>
   </xsl:copy>
</xsl:template>

I expect it was the rather weird use of namespaces that was throwing you. Which shows how important it is to give a complete example of the problem, not just the bits you think are relevant. Very often the problem is in the bits you didn't think mattered.

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