##

        my $twig =
            XML::Twig->new(
                start_tag_handlers => {
                        'UML:Class' => \¨_class_start,
                        'UML:Package' => \¨_package_start,
                },
                twig_handlers => {
                        # purge at the end of each class section
                        'UML:Class' => sub { $_[0]->purge },
                        'UML:Attribute' => \¨_attribute,
                        'UML:Generalization' => \¨_generalization,
                        'UML:TaggedValue' => \¨_taggedvalue,
                },
            );
    

##

##

                my $xmi_id = $elt->att( 'xmi.id' );
                my $name = $elt->att( 'name' );