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Manual Reference Pages  -  XML::LIBXML::XPATHEXPRESSION (3)

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NAME

XML::LibXML::XPathExpression - XML::LibXML::XPathExpression - interface to libxml2 pre-compiled XPath expressions

CONTENTS

SYNOPSIS



  use XML::LibXML;
  my $compiled_xpath = XML::LibXML::XPathExpression->new(//foo[@bar="baz"][position()<4]);

  # interface from XML::LibXML::Node

  my $result = $node->find($compiled_xpath);
  my @nodes = $node->findnodes($compiled_xpath);
  my $value = $node->findvalue($compiled_xpath);

  # interface from XML::LibXML::XPathContext

  my $result = $xpc->find($compiled_xpath,$node);
  my @nodes = $xpc->findnodes($compiled_xpath,$node);
  my $value = $xpc->findvalue($compiled_xpath,$node);

  $compiled = XML::LibXML::XPathExpression->new( xpath_string );



DESCRIPTION

This is a perl interface to libxml2’s pre-compiled XPath expressions. Pre-compiling an XPath expression can give in some performance benefit if the same XPath query is evaluated many times. XML::LibXML::XPathExpression objects can be passed to all find... functions XML::LibXML that expect an XPath expression.
new()


  $compiled = XML::LibXML::XPathExpression->new( xpath_string );



The constructor takes an XPath 1.0 expression as a string and returns an object representing the pre-compiled expressions (the actual data structure is internal to libxml2).

AUTHORS

Matt Sergeant, Christian Glahn, Petr Pajas

VERSION

2.0124

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.
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perl v5.20.3 XML::LIBXML::XPATHEXPRESSION (3) 2016-02-27

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