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XML::LibXML::XPathExpression.3pm
Langue: en
Version: 2009-10-07 (ubuntu - 24/10/10)
Section: 3 (Bibliothèques de fonctions)
NAME
XML::LibXML::XPathExpression - XML::LibXML::XPathExpression - interface to libxml2 pre-compiled XPath expressionsSYNOPSIS
use XML::LibXML; my $compiled_xpath = new XML::LibXML::XPathExpression('//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); $compiled = XML::LibXML::XPathExpression->new( xpath_string );
DESCRIPTION
This is a perl interface to libxml2's pre-compiled XPath expressions. Pre-compiling an XPath expression can give in some performance benefit if the same XPath query is evaluated many times. "XML::LibXML::XPathExpression" objects can be passed to all "find..." functions "XML::LibXML" that expect an XPath expression.- new()
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$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 PajasVERSION
1.70COPYRIGHT
2001-2007, AxKit.com Ltd.2002-2006, Christian Glahn.
2006-2009, Petr Pajas.
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre