Tip #5 : Taxonomy in WordPress 2.3
Posted by Leonid Mamchenkov on August 27, 2007
The upcoming release of WordPress 2.3 introduces a new way of tagging and categorizing posts and links. It replaces the old way of categories and should provide enough flexibility to replace a whole bunch of plugins. Or, at least, make those plugins much simpler.
This new feature required a few changes in the WordPress database scheme. Gladly, Ryan Boren has posted the description of changes in the database structure.