The Graph::Easy distribution will do the job. To get a GraphML text, use Graph::Easy::As_graphml. Here's the documentation's example. I saved the output to file. 
#!/usr/bin/perl -slw

use strict;
use Graph::Easy;

my $graph = Graph::Easy->new();
$graph->add_edge( 'Bonn', 'Berlin' );

open STDOUT,  '>',  'graph.graphml';
binmode STDOUT, ':encoding(UTF-8)';
print $graph->as_graphml();
close STDOUT;

[download]
Outputs: 

<?xml version="1.0" encoding="UTF-8"?>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns
     http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd">

  <!-- Created by Graph::Easy v0.70 at Thu Nov 17 03:13:06 2011 -->

  <graph id="G" edgedefault="directed">
    <node id="Berlin">
    </node>
    <node id="Bonn">
    </node>

    <edge source="Bonn" target="Berlin">
    </edge>
  </graph>
</graphml>

[download]
Use Graph::Easy::Parser to create a Graph::Easy object that you can convert to a graph. I used the as_ascii method. 
#!/usr/bin/perl -slw

use strict;
use Graph::Easy;
use Graph::Easy::Parser;

my $parser = Graph::Easy::Parser->new();
print $parser->from_text('[Bonn]->[Berlin]')->as_ascii();

[download]
Give it try. Good luck.

In reply to Re: which is the best way to convert xml to GraphML using perl. by Khen1950fx
in thread which is the best way to convert xml to GraphML using perl. by veerubiji

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