Does XML::SemanticDiff only compare two files line by line in same location. Small test below indicates that two exact lines for DBUS in file are not detected. DBUS reported as rogue element. 
#!/bin/perl
use strict;
use warnings;
my $file = 'xml1.xml';
my $file2 = 'xml2.xml';
my $h = Myclass->new;
# use XML::Parser;
use XML::SemanticDiff;
my $diff =  XML::SemanticDiff->new(diffhandler => $h, keepdata => 1);
$diff->compare($file, $file2);
package Myclass;
use Data::Dumper;
sub new { bless {}, shift }

sub attribute_value
{
  my ($self, $attr_name, $element, $to_props, $from_props) = @_;
  print "\n\nattribute value\n";
  print Dumper($self, $attr_name, $element, $to_props, $from_props);
}

sub rogue_element
{
  my ( $self, $name, $props ) = @_;
  print "\n\nrogue element\n";
  print Dumper($self, $name, $props);
}

[download]

Sample xml1 file

<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noName
+spaceSchemaLocation="panoply.xsd">
  <classes name="Panoply::AccessLogic">
    <all_members name="accessLogic" protection="public"/>
    <all_members name="DBUS" protection="public"/>
  </classes>
</root>

[download]

Sample xml2 file

<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noName
+spaceSchemaLocation="panoply.xsd">
  <classes name="Panoply::AccessLogic">
    <all_members name="accessLogic" protection="public"/>
    <all_members name="APR" protection="public"/>
    <all_members name="DBUS" protection="public"/>
  </classes>
</root>

[download]

In reply to XML SemanticDiff output by jccunning

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.