Here's how to get the requested structure using XML::LibXML. 
#! /usr/bin/perl
use warnings;
use strict;

use XML::LibXML;

my $dom = 'XML::LibXML'->load_xml(location => shift);
my %struct;
for my $ref ($dom->findnodes('/root/ref')) {
    for my $child ($ref->findnodes('*')) {
        push @{ $struct{ $ref->{name} }{ $child->nodeName } },
             { map { $_->nodeName => $_->value } $child->findnodes('@*
+') };
    }
}

use Data::Dumper; print Dumper \%struct;

[download]

But converting from XML::Simple to XML::LibXML usually changes the code much more. You can extract only the information you need from the XML, so you don't need to build the whole structure at all.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re: How do I get a list in a perl hash generated from an XML? by choroba
in thread How do I get a list in a perl hash generated from an XML? by PV66

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