Group items tagged

Faceted classification is an analytic-synthetic[clarification needed] classification scheme. A faceted classification uses semantic categories, either general or subject-specific, that are combined to create the full classification entry. Many library classification systems use a combination of a fixed, enumerative taxonomy of concepts with subordinate facets that further refine the topic.

Interesting dissertation, well organized, easy to use as reference

some good info here from Seth Earley