Keith Grennan

NAME

Text::Microformat - A Microformat parser

VERSION

Version 0.02

SYNOPSIS

        use Text::Microformat;
        use LWP::Simple;

        # Parse a document
        my $doc = Text::Microformat->new(
            get('http://phil.windley.org/hcard.html')
        );
        
        # Extract all known Microformats
        my @formats = $doc->find;
        
        my $hcard = shift @formats;

        # Easiest way to get a value (returns the first one found, else undef)

        my $full_name = $hcard->Get('fn');
        my $family_name = $hcard->Get('n.family-name');
        my $city = $hcard->Get('adr.locality');

        # Get the human-readable version specifically

        my $family_name = $hcard->GetH('n.family-name');

        # Get the machine-readable version specifically

        my $family_name = $hcard->GetM('n.family-name');

        # The more powerful interface (access multiple properties)
                
        my $family_name = $hcard->n->[0]->family_name->[0]->Value;

        # Dump to a hash
        
        my $hash = $hcard->AsHash;
        
        # Dump to YAML
        
        print $hcard->ToYAML, "\n";
        
        # Free the document and all the formats
        
        $doc->delete;

DESCRIPTION

Text::Microformat is a Microformat parser for Perl.

Text::Microformat sports a very pluggable API, which allows not only new kinds of Microformats to be added, but also extension of the parser itself, to allow new parsing metaphors and source document encodings.

FEATURES

  • Extracting Microformats from HTML, XHTML and XML

  • Extracting Microformats from entity-encoded or CDATA sections in RSS feeds.

  • The include pattern

  • Microformats built from other Microformats

SUPPORTED MICROFORMATS

  • hCard

OTHER SUPPORTED SEMANTIC MARKUP

  • hGrant

METHODS

  • new($content, %opts)

    Parses the string $content and creates a new Text::Microformat object.

    Recognized options:

    • content_type => 'text/html'

      Specify the content type. Any content type containing 'html' invokes the HTML Parser, and content type containing XML invokes XML Parser. Defaults to 'text/html'. (See HTML::TreeBuilder and XML::TreeBuilder)

  • find()

    Returns an array of all known Microformats in the document.

  • delete()

    Deletes the underlying parse tree - which is required by HTML::TreeBuilder to free up memory. Behavior of Text::Microformat::Element::* objects is undefined after this method is called.

EXTENDING Text::Microformat

CREATING A NEW FORMAT

This is as easy as creating a new module in the Text::Microformat::Element::* namespace, having Text::Microformat::Element as a super-class. It will be auto-loaded by Text::Microformat.

Every Microformat element has it's own namespace auto-generated, for example:

 Text::Microformat::Element::hCard::n::family_name

So it's easy to override the default behavior of Text::Microformat::Element via inheritance.

See existing formats for hints.

CREATING A PLUGIN

This is as easy as creating a new module in the Text::Microformat::Plugin::* namespace. It will be auto-loaded by Text::Microformat. Text::Microformat has several processing phases, and uses NEXT to traverse the plugin chain.

Current processing phases are, in order of execution:

  • defaults

    Set default options in $c->opts

  • pre_parse

    Pre-parsing activities (Operations on the document source, perhaps)

  • parse

    Parsing - at least one plugin must parse $c->content into $c->tree

  • post_parse

    Post-parsing activities (E.g. the include pattern happens here)

  • pre_find_formats

    Before looking for Microformats

  • find_formats

    Populate the $c->formats array with Text::Microformat::Element objects

  • post_find_formats

    After looking for Microformats

A plugin may add handlers to one or more phases.

See existing plugins for hints.

TODO

  • Documentation!

  • Add more formats

  • Add filtering options to the find() method

  • Parsing and format-finding performance could definitely be improved

SEE ALSO

HTML::TreeBuilder, XML::TreeBuilder, http://microformats.org

AUTHOR

Keith Grennan, <kgrennan at cpan.org>

BUGS

Log bugs and feature requests here: http://code.google.com/p/ufperl/issues/list

SUPPORT

Project homepage: http://code.google.com/p/ufperl/

COPYRIGHT & LICENSE

Copyright 2007 Keith Grennan, all rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.