my ($nsuri1, undef, $lname1) = $nsup1->process_element_name($n1->getNodeName);
my ($nsuri2, undef, $lname2) = $nsup2->process_element_name($n2->getNodeName);
my ($nsuri1, undef, $lname1) = $nsup1->process_element_name($n1->getNodeName);
my ($nsuri2, undef, $lname2) = $nsup2->process_element_name($n2->getNodeName);