---
name: "XML::LibXML::RegExp"
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::RegExp"
---

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

XML::LibXML::RegExp - interface to libxml2 regular expressions

## NAME

XML::LibXML::RegExp - XML::LibXML::RegExp - interface to libxml2 regular expressions

## SYNOPSIS

```
  use XML::LibXML;
  my $compiled_re = XML::LibXML::RegExp->new('[0-9]{5}(-[0-9]{4})?');
  if ($compiled_re->isDeterministic()) { ... }
  if ($compiled_re->matches($string)) { ... }
  $compiled_re = XML::LibXML::RegExp->new( $regexp_str );
  $bool = $compiled_re->matches($string);
  $bool = $compiled_re->isDeterministic();
```

## DESCRIPTION

This is a perl interface to libxml2's implementation of regular expressions, which are used e.g. for validation of XML Schema simple types (pattern facet).

- **new()**

  ```
    $compiled_re = XML::LibXML::RegExp->new( $regexp_str );
  ```

  The constructor takes a string containing a regular expression and returns a compiled regexp object.

- matches($string)

  ```
    $bool = $compiled_re->matches($string);
  ```

  Given a string value, returns a true value if the value is matched by the compiled regular expression.

- **isDeterministic()**

  ```
    $bool = $compiled_re->isDeterministic();
  ```

  Returns a true value if the regular expression is deterministic; returns false otherwise. (See the definition of determinism in the XML spec (\<http://www.w3.org/TR/REC-xml/#determinism\>))

## 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.