/ 
XML-OPML-0.20
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/ XML::OPML

NAME

XML::OPML - creates OPML (Outline Processor Markup Language) files and updates blogrolls

SYNOPSIS

# Create an OPML file

use XML::OPML;

my $opml = new XML::OPML(version => "1.1");

$opml->head(
            title => 'mySubscription',
            dateCreated => 'Mon, 16 Feb 2004 11:35:00 GMT',
            dateModified => 'Mon, 16 Feb 2004 11:35:00 GMT',
            ownerName => 'michael szul',
            ownerEmail => 'michael@madghoul.com',
            expansionState => '',
            vertScrollState => '',
            windowTop => '',
            windowLeft => '',
            windowBottom => '',
            windowRight => '',
          );

$opml->add_outline(
                text => 'Warren Ellis Speaks Clever',
                description => 'Warren Ellis\' Personal Weblog',
                title => 'Warren Ellis Speaks Clever',
                type => 'rss',
                version => 'RSS',
                htmlurl => 'http://www.diepunyhumans.com ',
                xmlurl => 'http://www.diepunyhumans.com/index.rdf ',
              );

$opml->add_outline(
                text => 'raelity bytes',
                descriptions => 'The raelity bytes weblog.',
                title => 'raelity bytes',
                type => 'rss',
                version => 'RSS',
                htmlurl => 'http://www.raelity.org ',
                xmlurl => 'http://www.raelity.org/index.rss10 ',
              );

# Create embedded outlines

$opml->add_outline(
                    opmlvalue => 'embed',
                    outline_one => {
                                     text => 'The first embedded outline',
                                     description => 'The description for the first embedded outline',
                                   },
                    outline_two => {
                                     text => 'The second embedded outline',
                                     description => 'The description for the second embedded outline',
                                   },
                    outline_three => {
                                       opmlvalue => 'embed',
                                       em_outline_one => {
                                                           text => 'I'm too lazy to come up with real examples',
                                                         },
                                       em_outline_two => {
                                                           text => 'so you get generic text',
                                                         },
                                     },
                  );

# Create an embedded outline with attributes in the encasing <outline> tag

$opml->add_outline(
                    opmlvalue => 'embed',
                    description => 'now we can have attributes in this tag',
                    title => 'attributes',
                    outline_with_atts => {
                                           text => 'Eat Your Wheaties',
                                           description => 'Cereal is the breakfast of champion programmers',
                                         },
                  );

# Save it as a string.

$opml->as_string();

# Save it to a file.

$opml->save('mySubscriptions.opml');

# Update your blogroll.

use XML::OPML;

my $opml = new XML::OPML;

# Update a file.

$opml->prepare_blogroll('mySubscriptions.opml');

$opml->add_outline(
                   text => 'Neil Gaiman\'s Journal',
                   description =>'Neil Gaiman\'s Journal',
                   title => 'Neil Gaiman\'s Journal',
                   type => 'rss',
                   version => 'RSS',
                   htmlurl => 'http://www.neilgaiman.com/journal/journal.asp ',
                   xmlurl => 'http://www.neilgaiman.com/journal/blogger_rss.xml ',
                 );

DESCRIPTION

This experimental module is designed to allow for easy creation of OPML files. OPML files are most commonly used for the sharing of blogrolls or subscriptions - an outlined list of what other blogs an Internet blogger reads. RSS Feed Readers such as AmphetaDesk ( http://www.disobey.com/amphetadesk ) use *.opml files to store your subscription information for easy access.

This is purely experimental at this point and has a few limitations.

Additionally, this module, may now support attributes in the <outline> element of an embedded hierarchy, but these are limited to the following attributes: date_added, date_downloaded, description, email, filename, htmlurl, text, title, type, version, and xmlurl. I'm currently looking into a way around this so that attributes can be anything.

Rather than reinventing the wheel, this module was modified from the XML::RSS module, so functionality works in a similar way.

METHODS

new XML::OPML(version => '1.1')

This is the constructor. It returns a reference to an XML::OPML object. This will always be version 1.1 for now, so don't worry about it.

head(title => '$title', dateCreated => '$cdate', dateModified => '$mdate',ownerName => '$name', ownerEmail => '$email', expansionState => '$es', vertScrollState => '$vs', windowTop => '$wt', windowLeft => '$wl', windowBottom => '$wb',windowRight => '$wr',)

This method will create all the OPML tags for the <head> subset. For more information on these tags, please see the OPML documentation at http://www.opml.org.

add_outline(opmlvalue => '$value', %attributes)

This method adds the <outline> elements to the OPML document(see the example above). There are no statement requirements for the attributes in this tag. The ones shown in the example are the ones most commonly used by RSS Feed Readers, blogrolls, and subscriptions. The opmlvalue element is optional. Only use this with the value 'embed' if you wish to embed another outline within the current outline. You can now use attributes in <outline> tags that are used for embedded outlines, however, you cannot use any attribute you want. The embedded <outline> tag only supports the following: date_added, date_downloaded, description, email, filename, htmlurl, text, title, type, version, and xmlurl. I am looking into a way around this.

as_string()

Returns a string containing the OPML document.

save($file)

Saves the OPML document to $file

prepare_blogroll($content)

Uses XML::Simple to parse the value of the string or file that is passed to it. This method prepares your blogroll for a possible update. Currently, only blogrolls without embedded outlines are supported.

SOURCE AVAILABILITY

Source code is available at the development site at http://opml.madghoul.com. Any contributions or improvements are greatly appreciated. You may also want to visit http://www.madghoul.com to see a whole lot of perl coding at work.

AUTHOR

michael szul <opml-dev@madghoul.com>

COPYRIGHT

copyright (c) 2004 michael szul <opml-dev@madghoul.com>

XML::OPML is free software. It may be redistributed and/or modified under the same terms as Perl.

CREDITS

michael szul <opml-dev@madghoul.com>
ricardo signes <rjbs@cpan.org>

SEE ALSO

perl(1), XML::Parser(3), XML::Simple(3), XML::RSS(3).