12 May 2005 15:08:24 UTC
- Distribution: XML-XUpdate-LibXML
- Module version: 0.6.0
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- DIFFERENCES BETWEEN 0.2.x and 0.3.x
- DIFFERENCES BETWEEN 0.3.x and 0.4.x
- DIFFERENCES BETWEEN 0.4.x and 0.5.x
- DIFFERENCES BETWEEN 0.5.x and 0.6.x
- SEE ALSO
XML::XUpdate::LibXML - Simple implementation of XUpdate format
use XML::LibXML; use XML::XUpdate::LibXML;
$parser = XML::LibXML->new(); $dom = $parser->parse_file("mydoc.xml"); $actions = $parser->parse_file("update.xml");
$xupdate = XML::XUpdate::LibXML->new(); $xupdate->process($dom->getDocumentElement(), $actions); print $dom->toString(),"\n";
This module implements the XUpdate format described in XUpdate Working Draft from 2000-09-14 (http://www.xmldb.org/xupdate/xupdate-wd.html). The implementation is based on XML::LibXML DOM API.
my $xupdate = XML::XUpdate::LibXML->new();
Creates a new XUpdate object. You may use this object to update several different DOM trees using several different XUpdate descriptions. The advantage of it is that an xupdate object remembers values all variables declared in XUpdate documents.
Tell the XPath engine to resolve given namespace prefix as the given namespace URI. This is particularly useful to bind a default namespace to a prefix because XPath doesn't honour default namespaces.
This function takes two DOM trees as its arguments. It works by updating the first tree according to all XUpdate commands included in the second one. All XUpdate commands must be children of the root element of the second tree and must all belong to XUpdate namespace "http://www.xmldb.org/xupdate". The namespace URI may be changed with set_namespace method.
You may use this method to change the namespace of XUpdate elements. The default namespace is "http://www.xmldb.org/xupdate".
Returns XUpdate namespace URI used by XUpdate processor to identify XUpdate commands.
In 0.3.x different implementation of XUpdate variables is used. Now variables contain the actual objects resulting from an XPath query, and not their textual content as in versions 0.2.x of XML::XUpdate::LibXML.
Also, value-of instruction results in copies of the actual objects it selects rather than their textual content as in 0.2.x.
I hope the new implementation is more conformant with the (not very clear) XUpdate Working Draft and therefore more compatible with other XUpdate implementations.
Commands are applied to all nodes of the select nodeset, not just the first one.
XML::LibXML::XPathContext is used for variable code providing more flexible and powerfull implementation. New and hopefully correct implementation of the problematic child attribute of update command has been introduced.
Support for registrering namespace prefix with the XPath engine (allows binding document's default namespace to a prefix).
Several bug fixes.
xu:if command implementation contributed by Amir Guindehi.
Petr Pajas, email@example.com
Copyright 2002-2005 Petr Pajas, All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
Module Install Instructions
To install XML::XUpdate::LibXML, copy and paste the appropriate command in to your terminal.
perl -MCPAN -e shell install XML::XUpdate::LibXML
For more information on module installation, please visit the detailed CPAN module installation guide.
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