OK, the workaround works well for me:

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

my $twig=XML::Twig->new();
$twig->xparse(shift);

traverse($twig->root);


sub traverse {
        my ($t) = @_;
        my $elt=$t;
        $elt=$t->att('#elt') if $t->att('#elt');
        print "gi=|",$t->gi,"|\tprefix=|",$elt->ns_prefix,"|\tnamespac
+e=|",$elt->namespace,"|\n";
        foreach my $c ($t->children) {
                if (@ARGV) {
                        my $copy = $c->copy;
                        $copy->set_att( '#elt', $c);
                        traverse($copy);
                } else {
                        traverse($c);
                }
        }
}
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I do think that the expected behavior in the case that I raised is that namespace information is kept. For those who don't want it -- it would be nice to have a method that will cause the elt to "forget" its namespace information.

What do you think about this?

Thanks again for your help and rapid response.

By the way, while we're talking about namespace support in XML::Twig -- please notice that there are unexpected #default namespaces attached to attributes when using the map_xmlns option to the new method. I think this is caused by XML::Parser::Expat. How can one avoid getting this #default and get the namespace (the URN) instead? I think that getting the URN for default namespace makes more sense than getting #default. Moreover, the #default is returned for attributes which have no default namespace according to the w3c recommendation. Why is that?

Thanks.