Looks quite a bit like XML::Rules :-)

use strict;
use warnings;

use XML::Rules;

XML::Rules->new(rules => { Sender => sub { print "sender: ", $_[1]->{_
+content}, "\n"; },
  Receiver =>  sub { print "sender: ", $_[1]->{_content}, "\n"; },
  FileType => sub { delete $_[1]->{_content}; print "  file: ", (keys(
+%{$_[1]}))[0], "\n";
    return; 
  },
  # it would work without the following rules, but is more efficient w
+ith them
  'InitTAP,FatalRAP,ReTxTAP' => 'content',
  '_default' => '',
})->parsefile( "fdata.xml");
[download]