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.com/xmltwig/tutorial/index.html. In fact the whole XML::Twig page at http://xmltwig.com/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 -y     will install all of the tools without prompt
  perl Makefile -n     will skip the installation of the tools

SYNOPSYS

single-tree mode
my $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= XML::Twig->new( twig_handlers => { section => \&flush}); $t->parsefile( 'doc.xml');
$t->flush;
sub flush { (my $twig, $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(

            twigroots => { '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
Encode or Text::Iconv or Unicode::Map8 and Unicode::Strings to do encoding conversions
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.com/xmltwig git project repository: http://github.com/mirod/xmltwig See the XML::Twig tutorial at http://www.xmltwig.com/xmltwig/tutorial/index.html

COPYRIGHT

       Copyright (c) 1999-2010, 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.