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



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
       2.0008

COPYRIGHT
       2001-2007, AxKit.com Ltd.

       2002-2006, Christian Glahn.

       2006-2009, Petr Pajas.



perl v5.16.2                                     2012-10-22                  XML::LibXML::XPathExpression(3)