MT-Redland - A MovableType/Redland Integration

MT-Redland is an attempt to integrate Movable Type with the Redland RDF Framework. It's goals are to provide a stable database backend for Movable Type, and a plugin framework for enabling easy semantic annotation of weblog data.

Requirements

To install MT-Redland, you'll need Movable Type 3.1 (or higher), Redland 1.0.0 (or higher) and perl bindings, and the following perl modules installed:

• Digest::SHA1
• Encode
• File::Spec
• HTML::Parser
• Sort::Naturally

While MT-Redland may work with older versions, I've only tested the code with Redland version 1.0.0, Raptor version 1.4.5, and Rasqal verion 0.9.7.

Installing MT-Redland

To install, you'll be copying the contents of lib, extlib, and plugins to your Movable Type's home directory, and easytoggle3.js to your static directory (your MT directory unless you've changed something).

When finished, the files should be arranged as so:

Configuring MT-Redland

Once installed in your MovableType lib/MT/ObjectDriver directory, the standard database configuration directives can be used in mt.cfg:

The Redland driver currently only uses the Redland mysql storage type. The database password should be stored in mt-db-pass.cgi, as with any other database driver.

Version History

Version 0.007 (2005-04-08)

• Object construction now uses RDQL only for loads with more than two terms to match (major speed improvement).
• Placements now don't delete other dc:subjects on save (was breaking entries with multiple categories).
• Added checks in load_iter to verify node type if loading is based on unverified RDQL.
• Fixed caching code to update/remove cached objects in save and remove.

Version 0.006 (2005-04-06)

• Added a README file.
• Added callback code for Comments to attach them to entries and authors (adds foaf:Person data).
• If there's an existing author for a new comment, we add new triples for name, url, email (not deleting old values).
• When creating a new mt storage model (construction of the storage object failed), the code now avoids creating a model object the first time around.
• Now avoids adding triples to the model if the object is a blank string. Missing triples are assumed to be '' during object loading.
• The rdf node is now cached in MT::Object objects. This was breaking with multiple calls to get_rdf_node before it had been saved to the database.
• Object construction now loads all data from redland with one find_statements call.
• Object remove code now looks for statements where the object is the target of the triple (instead of just the source).
• Comment email field now can change to a literal if the value is a sha1sum.
• Fixed predicate for attaching comments to entries (forgot to change after copy-paste).
• Added caching code using Time::Cache::LRU (not sure if this will pay off).
• Broke code off from load_iter as _sort_nodes and _make_stream.

Version 0.005 (2005-04-06)

• Added rdf mappings and callbacks for Comments.
• Added remove callback for removing Entry link/description data.
• Added callbacks for MT::Placement to add dc:subject triples for categories.
• If model construction fails, now tries to create a new "mt" model.

Version 0.004 (2005-04-05)

• Plugins now only addes CMS hooks if Redland is the ObjectDriver.
• Pulled redland iterator generation from load_iter and count to new _load_iterator.
• Added support for offset and start_val in load and load_iter %args.
• Now reads password file and sets $cfg->DBPassword to avoid having to patch MT.
• Uses Redland error handler to display error when creating the model fails.
• RDF Export with the MTEntryRDF tag now does the right thing with xml namespaces.

Version 0.003 (2005-04-04)

• Added locations plugin for dcterms:coverage triples.
• RDF Exporting directly from the model now works with MTEntryRDF template tag.
• Moved sorting in load_iter to happen before object construction (now happens on Redland nodes).
• Implemented more efficient count method (instead of calling load_iter).
• Now properly removes old rss:link and rss:description triples on update.
• Updated entry predicates to use rss terms.
• Added Entry pre_save callback to generate rss link and description triples.
• Moved Topic functions topic_of_type() and topics() into MT::Entry namespace as rdf_topic_of_type() and rdf_topics().

Version 0.002 (2005-04-03)

• Includes Topic code along with plugins for Image, Book, Event, and Document topics.
• Add a CMS hooks plugin to allow adding HTML to the MT edit entry page. HTML can be static, or be generate at runtime (with access to the MT $app object).
• The load and load_iter methods of MT::Object now support join, unique, limit, and sort options.
• Updating an entry with a new URL now does the Right Thing, changing the entry's resource.
• Topics of an entry are now handled with a MT plugin, using hooks into the MT CMS without patching any of MT's files.
• Added an RDF Export module for use by a RSS 1.0 template tag plugin.

Version 0.001 (2005-04-01)

Initial release.

• Functional Redland backend.
• Includes Reviews and References plugins.

Copyright

Copyright © 2005 Gregory Williams. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.