#set.aggregation  a group of things of the same kind that belong together and are so used: "a set of books"; "a set of golf clubs"; "a set of teeth"
  subtype:  #dentition  #singleton.set  #pair  #triad  #quartette  #quintet.set  #sextet.set  #septet.set  #octet.set  #chess_set  #manicure_set  #sum  #set_intersection  #field_of_competitors  #field_of_horses  #character_field  #bracket.set  #conjugation.set  #suite.set  #choir.set  #core_group  #score.set  #threescore
  member:  #volume.publication
  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 #set.aggregation; click here to add one.