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/