Relation owl#union_of__unionof (rdfs#class,rdf#list)  for unionOf(X,L) read: X is the union of the classes in the list L; i.e. if something is in any of the classes in L, it is in X, and vice versa
  supertype:  pm#relation_from_class_to_collection (pm)
  related_to:  sumo#exhaustive_decomposition (owl)
  subtype:  daml#disjoint_union_of (rdfs#class,rdf#list)  for disjointUnionOf(X,L) read: X is the disjoint union of the classes in the list L: (a) for any c1 and c2 in L, disjointWith(c1,c2), and (b) i.e. if something is in any of the classes in L, it is in X, and vice versa