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xml::xpath::literal(3) [osx man page]

XPath::Literal(3)					User Contributed Perl Documentation					 XPath::Literal(3)

XML::XPath::Literal - Simple string values. DESCRIPTION
In XPath terms a Literal is what we know as a string. API
new($string) Create a new Literal object with the value in $string. Note that &quot; and &apos; will be converted to " and ' respectively. That is not part of the XPath specification, but I consider it useful. Note though that you have to go to extraordinary lengths in an XML template file (be it XSLT or whatever) to make use of this: <xsl:value-of select="&quot;I'm feeling &amp;quot;sad&amp;quot;&quot;"/> Which produces a Literal of: I'm feeling "sad" value() Also overloaded as stringification, simply returns the literal string value. cmp($literal) Returns the equivalent of perl's cmp operator against the given $literal. perl v5.16.2 2001-03-16 XPath::Literal(3)

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HTML::TreeBuilder::XPath(3pm)				User Contributed Perl Documentation			     HTML::TreeBuilder::XPath(3pm)

HTML::TreeBuilder::XPath - add XPath support to HTML::TreeBuilder SYNOPSIS
use HTML::TreeBuilder::XPath; my $tree= HTML::TreeBuilder::XPath->new; $tree->parse_file( "mypage.html"); my $nb=$tree->findvalue( '/html/body//p[@class="section_title"]/span[@class="nb"]'); my $id=$tree->findvalue( '/html/body//p[@class="section_title"]/@id'); my $p= $html->findnodes( '//p[@id="toto"]')->[0]; my $link_texts= $p->findvalue( './a'); # the texts of all a elements in $p $tree->delete; # to avoid memory leaks, if you parse many HTML documents DESCRIPTION
This module adds typical XPath methods to HTML::TreeBuilder, to make it easy to query a document. METHODS
Extra methods added both to the tree object and to each element: findnodes ($path) Returns a list of nodes found by $path. In scalar context returns an "Tree::XPathEngine::NodeSet" object. findnodes_as_string ($path) Returns the text values of the nodes, as one string. findnodes_as_strings ($path) Returns a list of the values of the result nodes. findvalue ($path) Returns either a "Tree::XPathEngine::Literal", a "Tree::XPathEngine::Boolean" or a "Tree::XPathEngine::Number" object. If the path returns a NodeSet, $nodeset->xpath_to_literal is called automatically for you (and thus a "Tree::XPathEngine::Literal" is returned). Note that for each of the objects stringification is overloaded, so you can just print the value found, or manipulate it in the ways you would a normal perl value (e.g. using regular expressions). findvalues ($path) Returns the values of the matching nodes as a list. This is mostly the same as findnodes_as_strings, except that the elements of the list are objects (with overloaded stringification) instead of plain strings. exists ($path) Returns true if the given path exists. matches($path) Returns true if the element matches the path. find ($path) The find function takes an XPath expression (a string) and returns either a Tree::XPathEngine::NodeSet object containing the nodes it found (or empty if no nodes matched the path), or one of XML::XPathEngine::Literal (a string), XML::XPathEngine::Number, or XML::XPathEngine::Boolean. It should always return something - and you can use ->isa() to find out what it returned. If you need to check how many nodes it found you should check $nodeset->size. See XML::XPathEngine::NodeSet. as_XML_compact HTML::TreeBuilder's "as_XML" output is not really nice to look at, so I added a new method, that can be used as a simple replacement for it. It escapes only the '<', '>' and '&' (plus '"' in attribute values), and wraps CDATA elements in CDATA sections. Note that the XML is actually not garanteed to be valid at this point. Nothing is done about the encoding of the string. Patches or just ideas of how it could work are welcome. as_XML_indented Same as as_XML, except that the output is indented. SEE ALSO
Michel Rodriguez, <> COPYRIGHT AND LICENSE
Copyright (C) 2006-2011 by Michel Rodriguez This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.4 or, at your option, any later version of Perl 5 you may have available. perl v5.12.4 2011-09-20 HTML::TreeBuilder::XPath(3pm)
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