• subClassOf only (not AntiRigidClass)

• Class

NonRigidClass, RigidClass

AbsolutePart, AbsoluteWhole, CompleteObject, Deposit, DepositStratum, Interface, LandDivision, MaterialEntity, Matter, MethodologicalEntity, NaturalObject, NonMaterialSpatialEntity, ObjectEntity, ObjectFragment, ObjectStratum, Part, ParthoodConcept, PartWhole, PrimaryEntity, ProducedObject, Sample, SpatialEntity, StratigraphicEntity, StratigraphicSequence, StratigraphicUnit, Stratum, TangibleEntity, ValuableEntity, Whole

• Class ≡ NonDependentClass or DependentClass and RigidClass or NonRigidClass and SortalClass or NonSortalClass and UnityClass or NonUnityClass