typology(n = noun.act) - classification according to general type;
is a kind of assortment, categorisation, categorization, classification, compartmentalisation, compartmentalization

1.  A discourse or treatise on types. [1913 Webster]

2.  The doctrine of types. [1913 Webster]

typology, n. the study and interpretation of (esp. biblical) types.

Derivative:
typological adj. typologist n.

Etymology:
Gk tupos TYPE + -LOGY