Properties Table
From Federal Burro of Information
an approach to creating flexible ontologies using sql
< CREATE TABLE `property` ( < `subject` text, < `subject_id` int(11) DEFAULT NULL, < `relate_id` int(11) DEFAULT NULL, < `object` text, < `object_id` int(11) DEFAULT NULL, < `created` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00' < )
Things you can say with this schema:
subject id relate object id 'track' 2 'has' 'genre' 4 'Jazz' 8 'is_a' 'genre' 'Industrial' 10 'is_a' 'genre' 'genre' 'is_a' 'class'