XML::LibXML::RegExp(3) User Contributed Perl Documentation XML::LibXML::RegExp(3)

# [NAME](#NAME)

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

# [SYNOPSIS](#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](#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()**](#new%28%29)

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

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

[matches($string)](#matches%28$string%29)

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

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

[**isDeterministic()**](#isDeterministic%28%29)

```
  $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](#AUTHORS)

Matt Sergeant, Christian Glahn, Petr Pajas

# [VERSION](#VERSION)

2.0212

# [COPYRIGHT](#COPYRIGHT)

2001-2007, AxKit.com Ltd.

2002-2006, Christian Glahn.

2006-2009, Petr Pajas.

# [LICENSE](#LICENSE)

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

2026-10-30 perl v5.44.0

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Document: XML::LibXML::RegExp(3pm) from perl-xml-libxml 2.0212-r4 (Chainguard OS)
Source: https://github.com/shlomif/perl-XML-LibXML