---
name: "XML::LibXML::Dtd"
section: "3pm"
platform: "linux"
package: "perl-xml-libxml"
version: "2.0213-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/XML::LibXML::Dtd"
---

# XML::LibXML::Dtd(3pm)

XML::LibXML DTD Handling

## NAME

XML::LibXML::Dtd - XML::LibXML DTD Handling

## SYNOPSIS

```
  use XML::LibXML;
  $dtd = XML::LibXML::Dtd->new($public_id, $system_id);
  $dtd = XML::LibXML::Dtd->parse_string($dtd_str);
  $publicId = $dtd->getName();
  $publicId = $dtd->publicId();
  $systemId = $dtd->systemId();
```

## 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 XML::LibXML::Node, so all the methods available to nodes (particularly **toString()**) are available to Dtd objects.

## METHODS

- 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);
  ```

- parse\_string

  ```
    $dtd = XML::LibXML::Dtd->parse_string($dtd_str);
  ```

  The same as **new()** above, except you can parse a DTD from a string. Note that parsing from string may fail if the DTD contains external parametric-entity references with relative URLs.

- getName

  ```
    $publicId = $dtd->getName();
  ```

  Returns the name of DTD; i.e., the name immediately following the DOCTYPE keyword.

- publicId

  ```
    $publicId = $dtd->publicId();
  ```

  Returns the public identifier of the external subset.

- systemId

  ```
    $systemId = $dtd->systemId();
  ```

  Returns the system identifier of the external subset.

## AUTHORS

Matt Sergeant, Christian Glahn, Petr Pajas

## VERSION

2\.0213

## COPYRIGHT

2001-2007, AxKit.com Ltd.

2002-2006, Christian Glahn.

2006-2009, Petr Pajas.

## LICENSE

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.