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=head1 NAME
XML::LibXML::Dtd - XML::LibXML DTD Handling
=head1 SYNOPSIS
  $dtd = XML::LibXML::Dtd->new($public_id, $system_id)
  $dtd = XML::LibXML::Dtd->parse_string($dtd_str)
=head1 DESCRIPTION
This class holds a DTD. You may parse a DTD from either a string, or from an
external SYSTEM identifier.
No support is available as yet for parsing from a filehandle.
XML::LibXML::Dtd is a sub-class of Node, so all the methods available to nodes
(particularly toString()) are available to Dtd objects.
=over 4
=item B<new>
  $dtd = XML::LibXML::Dtd->new($public_id, $system_id)
Parse a DTD from the system identifier, and return a DTD object that you can
pass to $doc->is_valid() or $doc->validate().
   my $dtd = XML::LibXML::Dtd->new(
                        "SOME // Public / ID / 1.0",
                        "test.dtd"
                                  );
   my $doc = XML::LibXML->new->parse_file("test.xml");
   $doc->validate($dtd);
=item B<parse_string>
  $dtd = XML::LibXML::Dtd->parse_string($dtd_str)
The same as new() above, except you can parse a DTD from a string.
=back
=head1 AUTHORS
Matt Sergeant, 
Christian Glahn, 
=head1 VERSION
1.58
=head1 COPYRIGHT
2001-2004, AxKit.com Ltd; 2002-2004 Christian Glahn, All rights reserved.
=cut