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

NAME  SYNOPSIS  DESCRIPTION  AUTHORS  VERSION  COPYRIGHT  LICENSE 

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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.

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