xml - moving repeating elements into a copy of its parent -

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if <animal>has more 1 <xxx> need duplicate <animal> (duplicate count = count of repeating <xxx> within corresponding<animal> ) , move repeating <xxx> copy.

in xml <xxx> repeating twice first instance of <animal>, in output need have 2 <animals>. first <animal> should contain first instance of <xxx> , second <animal> should contain second instance of <xxx>

input xml

<?xml version="1.0" encoding="utf-8"?> <header>     <animal>         <element1>element1</element1>         <element2>element2</element2>         <element3 lang="en">element3</element3>         <xxx>             <code>yy</code>             <description>code yy</description>         </xxx>         <xxx>             <code>zz</code>             <description>code zz</description>         </xxx>     </animal>     <animal>         <xxx>             <code>aa</code>             <description>code aa</description>         </xxx>     </animal> </header>

required required transformation

<?xml version="1.0" encoding="utf-8"?> <header>     <animal>         <element1>element1</element1>         <element2>element2</element2>         <element3 lang="en">element3</element3>         <xxx>             <code>yy</code>             <description>code yy</description>         </xxx>             </animal>     <animal>         <element1>element1</element1>         <element2>element2</element2>         <element3 lang="en">element3</element3>                 <xxx>             <code>zz</code>             <description>code zz</description>         </xxx>     </animal>     <animal>         <xxx>             <code>aa</code>             <description>code aa</description>         </xxx>     </animal> </header>

any appriciated. in advance

my solutions typically not elegant, produce desired output - have look...

<?xml version="1.0" encoding="utf-8" standalone="yes"?>  <xsl:transform version="1.0"      xmlns:xsl="http://www.w3.org/1999/xsl/transform" >   <xsl:output method="xml" indent="yes"/> <xsl:strip-space elements="*"/>  <xsl:template match="*|@*">     <xsl:copy>         <xsl:apply-templates select="*|@*|text()"/>     </xsl:copy> </xsl:template>  <xsl:template match="animal">     <xsl:param name="i" select="xxx[1]"/>     <xsl:variable name="thisanimal" select="."/>     <xsl:choose>         <xsl:when test="count(xxx) = 1">             <!-- 1 here -->             <xsl:copy-of select="."/>         </xsl:when>         <xsl:when test="$i = xxx[1]">             <!-- more 1 here, use first -->             <xsl:copy>                 <xsl:apply-templates select="*[name() != 'xxx']"/>                 <xsl:apply-templates select="$i"/>             </xsl:copy>             <xsl:for-each select="xxx[position() &gt; 1]">                 <xsl:apply-templates select="$thisanimal">                     <xsl:with-param name="i" select="."/>                 </xsl:apply-templates>             </xsl:for-each>         </xsl:when>         <xsl:otherwise>             <!-- more 1 here -->             <xsl:copy>                 <xsl:apply-templates select="*[name() != 'xxx']"/>                 <xsl:apply-templates select="$i"/>             </xsl:copy>         </xsl:otherwise>     </xsl:choose> </xsl:template>  </xsl:transform>

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