=head1 NAME

XML::LibXML::Dtd - A Class implementing Dtd Nodes

=head1 SYNOPSIS

  use XML::LibXML::Dtd;

  $dtd = XML::LibXML::Dtd->new($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.

=head2 Methods

=over 4

=item B<new>

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>

The same as new() above, except you can parse a DTD from a string.

=back

