in my source xml the node stuctute is like that...
<root>
 <group name="G_1"/>
 <group name="G_2"/>
 <group name="G_3"/>
</root>

i want to make it in mys result xml like that..
<root>
 <group name="G_1">
     <group name="G_2">
        <group name="G_3"/>
      </group name="G_1">
   </group name="G_1">
</root>

how to do that by xsl...can anybody pls help me....thnx

You can't have attributes in an end tag.

Try

<xsl:template match="root">
<xsl:copy>
  <xsl:apply-templates select="*[1]"/>
</xsl:copy>
</xsl:template>

<xsl:template match="group">
<xsl:copy>
  <xsl:copy-of select="@name"/>
  <xsl:apply-templates select="following-sibling::*[1]"/>
</xsl:copy>
</xsl:template>


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