This class comprises activities that are designed to, and succeed in, creating one or more new items. It specializes the notion of modification into production. The decision as to whether or not an object is regarded as new is context sensitive. Normally, it This entity can be collective: the printing of a thousand books, for example, would normally be considered a single event. An event should also be documented using E81 Transformation if it results in the destruction of one or more objects and the simultaneous production of other ##

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my $twig = XML::Twig->new(
                          twig_handlers => {
                              Class => \&offer
                          }
                         );
$twig->parsefile('class.xml');
sub offer
{
        my( $t, $offer)= @_;

if ($offer->first_child('subClassOf')) {

print"is subclass of" .$offer->first_child('subClassOf')->att('resource')
}


      $t->purge;
}