Let's say foo.xml contains the following.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<food>
  <fruit name='Apple'></fruit>
</food>

Here is how you would parse foo.xml and print the XML tags using XML::Twig.

#!/usr/bin/perl
use strict;
use warnings;
use XML::Twig;

my $twig = new XML::Twig;
$twig->parsefile('foo.xml');
$twig->print;

The following should be returned.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<food><fruit name="Apple"></fruit></food>

And here is how you would print the value of the "name" attribute.

foreach my $name ($twig->root->first_child('fruit')->att('name')) {
  print $name;
}

Which should return the following.

Apple