Is there a way if I have XML.

<my_group count=3/>

The output I am expecting is adding child element based on value of
@count.

Output something like

<my_group count="3">
        <group name="type1"/>
        <group name="type2"/>
        <group name="type3"/>
</mygroup>

Any ideas will be highly appreciated.

T:\ftemp>type pankaj.xml
<my_group count="3"/>
T:\ftemp>type pankaj.xsl
<?xml version="1.0" encoding="US-ASCII"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns:xsd="http://www.w3.org/2001/XMLSchema"
                exclude-result-prefixes="xsd"
                version="2.0">

<xsl:template match="my_group">
  <xsl:copy>
    <xsl:copy-of select="@*"/>
    <xsl:for-each select="1 to xsd:integer(@count)">
      <group name="type{.}"/>
    </xsl:for-each>
  </xsl:copy>
</xsl:template>

</xsl:stylesheet>
T:\ftemp>xslt2 pankaj.xml pankaj.xsl
<?xml version="1.0" encoding="UTF-8"?>
<my_group count="3">
   <group name="type1"/>
   <group name="type2"/>
   <group name="type3"/>
</my_group>
T:\ftemp>

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