31 Mar 2004 19:49:55 UTC
- Distribution: XML-LibXML
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- VERSION INFORMATION
- RELATED MODULES
- XML::LIBXML AND XML::GDOME
XML::LibXML - Perl Binding for libxml2
$Version_String = XML::LibXML::LIBXML_DOTTED_VERSION; $Version_ID = XML::LibXML::LIBXML_VERSION; $libxmlnode = XML::LibXML->import_GDOME( $node, $deep ); $gdomenode = XML::LibXML->export_GDOME( $node, $deep );
use XML::LibXML; my $parser = XML::LibXML->new(); my $doc = $parser->parse_string(<<'EOT'); <some-xml/> EOT
This module is an interface to the gnome libxml2 DOM and SAX parser and the DOM tree. It also provides an XML::XPath-like findnodes() interface, providing access to the XPath API in libxml2. The module is split into several packages which are not described in this section.
For further information, please check the following documentation:
Parsing XML Files with XML::LibXML
XML::LibXML DOM Implementation
XML::LibXML direct SAX parser
XML::LibXML DOM Document Class
Abstract Base Class of XML::LibXML Nodes
XML::LibXML Class for Element Nodes
XML::LibXML Class for Text Nodes
XML::LibXML Comment Nodes
XML::LibXML Class for CDATA Sections
XML::LibXML Attribute Class
XML::LibXML's DOM L2 Document Fragment Implementation
XML::LibXML Namespace Implementation
XML::LibXML Processing Instructions
XML::LibXML DTD Support
XML::LibXML frontend for RelaxNG schema validation
Internal of the Perl Layer for libxml2 (not done yet)
Sometimes it is usefull to figure out, for which version XML::LibXML was compiled for. In most cases this is for debugging or to check if a given installation meets all functionality for the package. The functiones XML::LibXML::LIBXML_DOTTED_VERSION and XML::LibXML::LIBXML_VERSION provide this version information. Both functions simply pass through the values of the similar named macros of libxml2.
$Version_String = XML::LibXML::LIBXML_DOTTED_VERSION;
Returns the Versionstring of the libxml2 version XML::LibXML was compiled for. This will be "2.6.2" for "libxml2 2.6.2".
$Version_ID = XML::LibXML::LIBXML_VERSION;
Returns the version id of the libxml2 version XML::LibXML was compiled for. This will be "20602" for "libxml2 2.6.2". Don't mix this version id with $XML::LibXML::VERSION. The latter contains the version of XML::LibXML itself while the first contains the version of libxml2 XML::LibXML was compiled for.
The modules described in this section are not part of the XML::LibXML package itself. As they support some additional features, they are mentioned here.
XSLT Processor using libxslt and XML::LibXML
Common functions for XML::LibXML related Classes
XML::LibXML Implementation of the DOM Traversal Specification
Advanced XPath processing using libxml2 and XML::LibXML
Note: THE FUNCTIONS DESCRIBED HERE ARE STILL EXPERIMENTAL
Although both modules make use of libxml2's XML capabilities, the DOM implementation of both modules are not compatible. But still it is possible to exchange nodes from one DOM to the other. The concept of this exchange is pretty similar to the function cloneNode(): The particular node is copied on the lowlevel to the opposite DOM implementation.
Since the DOM implementations cannot coexist within one document, one is forced to copy each node that should be used. Because you are always keeping two nodes this may cause quite an impact on a machines memory usage.
XML::LibXML provides two functions to export or import GDOME nodes: import_GDOME() and export_GDOME(). Both function have two parameters: the node and a flag for recursive import. The flag works as in cloneNode().
The two functions allow to export and import XML::GDOME nodes explicitly, however, XML::LibXML allows also the transparent import of XML::GDOME nodes in functions such as appendChild(), insertAfter() and so on. While native nodes are automaticly adopted in most functions XML::GDOME nodes are always cloned in advance. Thus if the original node is modified after the operation, the node in the XML::LibXML document will not have this information.
$libxmlnode = XML::LibXML->import_GDOME( $node, $deep );
This clones an XML::GDOME node to a XML::LibXML node explicitly.
$gdomenode = XML::LibXML->export_GDOME( $node, $deep );
Allows to clone an XML::LibXML node into a XML::GDOME node.
Matt Sergeant, Christian Glahn, =head1 VERSION
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