.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. Capital omega is used to do unbreakable dashes and .\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, .\" nothing in troff, for use with C<>. .tr \(*W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} .el\{\ . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' . ds C` . ds C' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is >0, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .\" .\" Avoid warning from groff about undefined register 'F'. .de IX .. .nr rF 0 .if \n(.g .if rF .nr rF 1 .if (\n(rF:(\n(.g==0)) \{\ . if \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{\ . nr % 0 . nr F 2 . \} . \} .\} .rr rF .\" ======================================================================== .\" .IX Title "XML::LibXML::XPathExpression 3" .TH XML::LibXML::XPathExpression 3 "2024-01-24" "perl v5.32.1" "User Contributed Perl Documentation" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" XML::LibXML::XPathExpression \- XML::LibXML::XPathExpression \- interface to libxml2 pre\-compiled XPath expressions .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 2 \& use XML::LibXML; \& my $compiled_xpath = XML::LibXML::XPathExpression\->new(\*(Aq//foo[@bar="baz"][position()<4]\*(Aq); \& \& # 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 ); .Ve .SH "DESCRIPTION" .IX Header "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. \f(CW\*(C`XML::LibXML::XPathExpression\*(C'\fR objects can be passed to all \f(CW\*(C`find...\*(C'\fR functions \f(CW\*(C`XML::LibXML\*(C'\fR that expect an XPath expression. .IP "\fBnew()\fR" 4 .IX Item "new()" .Vb 1 \& $compiled = XML::LibXML::XPathExpression\->new( xpath_string ); .Ve .Sp 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). .SH "AUTHORS" .IX Header "AUTHORS" Matt Sergeant, Christian Glahn, Petr Pajas .SH "VERSION" .IX Header "VERSION" 2.0210 .SH "COPYRIGHT" .IX Header "COPYRIGHT" 2001\-2007, AxKit.com Ltd. .PP 2002\-2006, Christian Glahn. .PP 2006\-2009, Petr Pajas. .SH "LICENSE" .IX Header "LICENSE" This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.