#class.aggregation__clas__family  a collection of things sharing a common attribute; "there are two classes of detergents"
  subtype:  #class_Larvacea  #class_Diplopoda  #subclass_Malacostraca  #grammatical_category  #substitution_class  #stamp  #sex  #declension  #conjugation  #denomination.class
  member:  #superphylum
  supertype:  #aggregation__collection__accumulation__assemblage  several things grouped together
     supertype:  #group__grouping  any number of entities (members) considered as a unit
        supertype:  pm#collection  something gathering separated things (entities/situations)
           supertype:  pm#divisible_entity__divisibleentity  many classifications under this category are application-dependant
              supertype:  pm#entity  something that can be "involved" in a situation
                 supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
              supertype:  pm#divisible_thing__divisiblething
                 supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

No statement uses or specializes #class.aggregation; click here to add one.