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


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

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
       2.0209

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.

perl v5.38.0                      2023-07-25   XML::LibXML::XPathExpression(3)