NAME

XML::DTD::ContentModel - Perl module representing an element content model in an XML DTD

SYNOPSIS

  use XML::DTD::ContentModel;

  my $cm = XML::DTD::ContentModel->new('(a,b*,(c|d)+)');
  print $cm->treestring;

DESCRIPTION

XML::DTD::ContentModel is a Perl module representing an element content model in an XML DTD. The following methods are provided.

new

 my $cm = XML::DTD::ContentModel->new('(a,b*,(c|d)+)');

 Construct a new XML::DTD::ContentModel object.

isa

 if (XML::DTD::ContentModel->isa($obj) {
 ...
 }

Test object type.

children

 my $objlst = $cm->children;

Return the list of child objects (subexpressions).

element

 my $name = $cm->element;

Return the element name if the object has no subexpressions.

combineop

 my $op = $cm->combineop;

Return the combination operator ("," or "|").

occurop

 my $op = $cm->occurop;

Return the occurrence operator ("?","+", or "*").

isatomic

 if ($cm->isatomic) {
 ...
 }

Determine whether the object is atomic (i.e. the model consists of a single element, ANY, EMPTY, or #PCDATA).

childnames

 my $nmlst = $cm->childnames;

 Return a list of contained elements.

string

 print $cm->string;

Return a string representation of the content model.

treestring

 print $cm->treestring;

Return a string representing the hierarchical structure of the model.

writexmlelts

 open(FH,'>file.xml');
 my $xo = new XML::Output({'fh' => *FH});
 $cm->writexmlelts($xo);

Write a component-specific part of the XML representation.

type

 my $typstr = $cm->type;

Determine the content specification type ('empty', 'any', 'mixed', or 'element').

dfa

 my $dfa = $cm->dfa;

Construct a Deterministic Finite Automaton to validate the content model.

SEE ALSO

XML::DTD, XML::DTD::Element, XML::DTD::Automaton

AUTHOR

Brendt Wohlberg <wohl@cpan.org>

COPYRIGHT AND LICENSE

Copyright (C) 2006 by Brendt Wohlberg

This library is available under the terms of the GNU General Public License (GPL), described in the GPL file included in this distribution.