classification

classification, n
1. The action of classifying or arranging in classes, according to common characteristics or affinities; assignment to the proper class.
2. The result of classifying; a systematic distribution, allocation, or arrangement, in a class or classes; esp. of things which form the subject-matter of a science or of a methodic inquiry.

-- Oxford English Dictionary, 2nd edn

On those remote pages it is written that animals are divided into (a) those that belong to the emperor, (b) embalmed ones, (c) those that are trained, (d) suckling pigs, (e) mermaids, (f) fabulous ones, (g) stray dogs, (h) those that are included in this classification, (i) those that tremble as if they were mad, (j) innumerable ones, (k) those drawn with a very fine camel hair's brush, (l) others, (m) those that have just broken a flower vase, (n) those that resemble flies from a distance.

-- J. L. Borges, Other Inquisitions, 1966