Please be kind with me as I am new to the XSLT. I manage to bite the
bullet and manage to write the following xslt. This xslt seems sort
the leaf node except I have the following issues:

1. It does not create recursive child node like original (please see
the updated xml and output xml below). It created the flat tree (i.e.
all child leaf node derived from root node)
2. The output xml skip the attributes (i.e img, sender, subject) in
treeview and folder node.

As always many thanks in advance.

Reagrs,
Anu

XML:
==========================================
<?xml version="1.0" encoding="UTF-8"?>
<treeview img="BSmith" sender="" subject="" date="" expanded="true">
  <folder img="folder.gif" sender="Notes" subject="" date=""
expanded="true">
    <leaf img="mail.gif" sender="User1" subject="Windows need to be
activate" date="2005/09/12 09:30" expanded="true"/>
    <leaf img="mail.gif" sender="User1" subject="solution updated"
date="2007/02/17 16:46" expanded="true"/>
    <leaf img="mail.gif" sender="Din" subject="STG test"
date="2007/04/11 15:59" expanded="true"/>
    <folder img="folder.gif" sender="Test 2.0" subject="" date=""
expanded="true">
      <folder img="folder.gif" sender="Test 2.1" subject="" date=""
expanded="true">
        <leaf img="mail.gif" sender="User1" subject="server name"
date="2005/09/12 17:02" expanded="true"/>
        <leaf img="mail.gif" sender="User1" subject="API related
questions" date="2005/09/15 15:44" expanded="true"/>
      </folder>
    </folder>
    <folder img="folder.gif" sender="Test1" subject="" date=""
expanded="true">
       <leaf img="mail.gif" sender="Smith" subject="application setup"
date="2005/09/15 15:56" expanded="true"/>
       <leaf img="mail.gif" sender="User1" subject="Weekly meeting"
date="2007/04/02 12:05" expanded="true"/>
    </folder>
  </folder>
</treeview>
==========================================

XSLT:
==========================================
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
<xsl:output method="xml"/>

<!-- Treeview node -->
<xsl:template match="treeview">
  <treeview>
     <xsl:apply-templates select="//folder" />
  </treeview>
</xsl:template>

<!-- Folder node -->
<xsl:template match="folder">
 <xsl:copy>
 <xsl:apply-templates select="leaf">
     <!-- Sort the node by the sender then date -->
     <xsl:sort select="@sender" data-type="text"/>
     <xsl:sort select="@date" data-type="text"/>
 </xsl:apply-templates>
 </xsl:copy>
</xsl:template>

<!-- Leaf node -->
<xsl:template match="leaf">
 <xsl:copy-of select="."/>
</xsl:template>
</xsl:stylesheet>
=============================

Output XML:
==============================
<?xml version="1.0"?>
<treeview>
<folder>
<leaf img="mail.gif" sender="Din" subject="STG test" date="2007/04/11
15:59" expanded="true" />
<leaf img="mail.gif" sender="User1" subject="Windows need to be
activate" date="2005/09/12 09:30" expanded="true" />
<leaf img="mail.gif" sender="User1" subject="solution updated"
date="2007/02/17 16:46" expanded="true" />
</folder>
<folder>
</folder>
<folder>
<leaf img="mail.gif" sender="User1" subject="server name"
date="2005/09/12 17:02" expanded="true" />
<leaf img="mail.gif" sender="User1" subject="API related questions"
date="2005/09/15 15:44" expanded="true" />
</folder>
<folder>
<leaf img="mail.gif" sender="Smith" subject="application setup"
date="2005/09/15 15:56" expanded="true" />
<leaf img="mail.gif" sender="User1" subject="Weekly meeting"
date="2007/04/02 12:05" expanded="true" />
</folder>
</treeview>
=================================