Facets
To summarize, the concept is that subjects can be broken down
into aspects (i.e. facets) with the primary ones time, place,
action, material, and personality - you can think of this
last category as natural groupings of the type that
standardized subdivisions can be applied to such as
materials, animals, corporate entitities, diseases, body
parts, etc.
I'm not sure how to use all of these