NAME

XML::Twig - Tree interface to XML documents allowing processing chunk
            by chunk of huge documents.

SUMMARY (see perldoc XML::Twig for full details)

XML::Twig is (yet another!) XML transformation module.

Its strong points: can be used to process huge documents while still being in tree mode; not bound by DOM or SAX, so it is very perlish and offers a very comprehensive set of methods; simple to use; DWIMs as much as possible

What it doesn’t offer: full SAX support (it can export SAX, but only reads XML), full XPath support (unless you use XML::Twig::XPath), nor DOM support.

Other drawbacks: it is a big module, and with over 500 methods available it can be a bit overwhelming. A good starting point is the tutorial at http://xmltwig.org/xmltwig/tutorial/index.html. In fact the whole XML::Twig page at http://xmltwig.org/xmltwig/ has plenty of information to get you started with XML::Twig

TOOLS

XML::Twig comes with a few tools built on top of it:

xml_pp XML pretty printer xml_grep XML grep - grep XML files using XML::Twig’s subset of XPath xml_split split big XML files xml_merge merge back files created by xml_split xml_spellcheck spellcheck XML files skipping tags

Running perl Makefile.PL will prompt you for each tool installation. perl Makefile.PL -y will install all of the tools without prompt perl Makefile.PL -n will skip the installation of the tools

SYNOPSYS

single-tree mode my $t=XML::Twig->new();t=\; XML::Twig->new();$t->parsefile( ‘doc.xml’); $t->print;

chunk mode # print the document, at most one full section is loaded in memory my t->parsefile( ‘doc.xml’); t->flush; sub flush { (mytwig, $section)={\mathrm{@}}_{;}section)=\; @\_;$twig->flush; }

sub-tree mode # print all section title’s in the document, # all other elements are ignored (and not stored) my t= XML::Twig->new( twig_roots => { 'section/title' => sub {_->print, “\n” } } ); $t->parsefile( ‘doc.xml’);

INSTALLATION

perl Makefile.PL
make
make test
make install

DEPENDENCIES

XML::Twig needs XML::Parser (and the expat library) installed

Modules that can enhance XML::Twig are:

Scalar::Util or WeakRef
  to avoid memory leaks
Tie::IxHash 
  to use the keep_atts_order option
XML::XPathEngine
  to use XML::Twig::XPath
LWP
  to use parseurl
HTML::Entities
  to use the html_encode filter
HTML::TreeBuilder
  to process HTML instead of XML

CHANGES

See the Changes file

AUTHOR

Michel Rodriguez (mirod@cpan.org)
The Twig page is at http://www.xmltwig.org/xmltwig
git project repository: http://github.com/mirod/xmltwig
See the XML::Twig tutorial at http://www.xmltwig.org/xmltwig/tutorial/index.html

COPYRIGHT

   Copyright (c) 1999-2025, Michel Rodriguez. All Rights Reserved.
   This library is free software; you can redistribute it and/or modify
   it under the same terms as Perl itself.