Hi there, this should get you going:

use strict;
use warnings;
use XML::Hash;
use Data::Dumper;

my %data;
open my $xmldata, '<', 'file.xml' or die $!;
for my $product (values XML::Hash->new()->fromXMLStringtoHash($xmldata
+)) {
        my ($product, $license, $id, $code, $name) = (
                $product->{productName}->{text},
                $product->{licenseName}->{text},
                $product->{externalProductIdentifier}->{text},
                $product->{baseCode}->{text},
                $product->{name});
        $data{$license} = [ $product, $id, $code, $name ];
}
print Dumper \%data/
[download]

Output when run against your example xml:

$VAR1 = {
          'Airtime_Tool' => [
                            'Airtime',
                            '10',
                            'AT',
                            'aero'
                          ]
        };
[download]

*Updated the code to store into a hash map