<?xml version="1.0"?>
 <spam-document version="3.5" timestamp="2002-05-13 15:33:45">
 <!-- Autogenerated by WarbleSoft Spam Version 3.5 -->
 <customer>
  <first-name>Joe</first-name>
  <surname>Wrigley</surname>
  <address>
    <street>17 Beable Ave.</street>
    <city>Meatball</city>
    <state>MI</state>
    <zip>82649</zip>
  </address>
  <email>joewrigley@jmac.org</email>
  <age>42</age>
 </customer>
 </spam-document>

#!/usr/bin/env perl

use strict;
use warnings;
use XML::DOM;
use XML::DOM::XPath;
use XML::SemanticDiff;

my ($file1, $file2) = @ARGV;

my $doc1 = do { local(*ARGV, $/, $_); @ARGV = $file1; <>; };
my $doc2 = do { local(*ARGV, $/, $_); @ARGV = $file2; <>; };

my $differ = XML::SemanticDiff->new(keepdata => 1,);
my @deltas = $differ->compare( $doc1, $doc2 );

my $majorDOMus = XML::DOM::Parser->new();
my ($tree1, $tree2) = map { $majorDOMus->parse($_); } $doc1, $doc2;

for my $delta (@deltas) {
    my $path = $delta->{'context'};
    my @nodes;
    
    ( push @nodes, $tree1->findnodes($path) ) ?
        1 :
        ( push @nodes, $tree2->findnodes($path) ) ?
            1 :
            print "\nThere is no node at '$path'\n";
            
    if (@nodes) {
        print "\nNODEVALUE(getNodeValue): ", $_->getNodeValue for @nodes;
        print "\nNODEVALUE(getData): ", $_->XML::DOM::CharacterData::getData for @nodes;
        print "\nTOSTRING: ", $_->toString, "\n" for @nodes;
    }
}

Use of uninitialized value in print at ./TestGetValue line 31.
NODEVALUE(getNodeValue): 
NODEVALUE(getData): city
TOSTRING: <city>Meatball</city>