Any help is highly welcome!

I'm no expert in this subject but here's a XSLT transform from the original XML into one with the correct order

#!perl
use strict;
use XML::LibXSLT;
use XML::LibXML;

=head1 test.xsl
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Tr
+ansform">
  <xsl:output indent="yes"/>
  <xsl:strip-space elements="*"/>

  <xsl:template match="node()|@*">
    <xsl:copy>
      <xsl:apply-templates select="node()|@*"/>
    </xsl:copy>
  </xsl:template>

  <xsl:template match="TRGROUP">
      <xsl:copy>
        <xsl:apply-templates select="COLS"/>
        <xsl:apply-templates select="COLSPEC"/>
        <xsl:apply-templates select="THEAD"/>
        <xsl:apply-templates select="TBODY"/>
      </xsl:copy>      
  </xsl:template>
</xsl:stylesheet>
=cut

my $parser = XML::LibXML->new();
my $xslt   = XML::LibXSLT->new();
my $stylesheet = $xslt->parse_stylesheet_file('test.xsl');

my $xml;
{
  local $/='';
  $xml = <DATA>;
}

my $source_doc = $parser->parse_string( $xml );
my $result = $stylesheet->transform( $source_doc );
print $stylesheet->output_string( $result );


__DATA__
<TABLE>
<TRGROUP>
  <COLS>AA</COLS>
  <TBODY>A</TBODY>
  <COLSPEC>XX</COLSPEC>
  <THEAD>1</THEAD>
</TRGROUP>
<TRGROUP>
  <COLSPEC>XX</COLSPEC>
  <TBODY>B</TBODY>
  <THEAD>2</THEAD>
  <COLS>BB</COLS>
</TRGROUP>
<TRGROUP>
  <TBODY>C</TBODY>
  <COLS>CC</COLS>
  <COLSPEC>ZZ</COLSPEC>
  <THEAD>3</THEAD>
</TRGROUP>
</TABLE>

[download]
poj

In reply to Re: xml using XML::Simple reording of XML-Content by poj
in thread xml using XML::Simple reording of XML-Content by tobias_hofer

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.