An ENTITY is an object with structurally stable properties. It differs from a MODEL-FRAGMENT in the set of properties that make sense for it. E.g. an 'automobile' is naturally represented as an entity, which might have attributes such as color: red, manufacturer: ford.
(=> (= (Scenario.Participants ?S) ?Participants) (=> (Member ?P ?Participants) (Entity ?P))) (<= (Range $X Entity) (Participant-Function $X)) (Inherited-Slot-Value Participant-Function Range Entity) (<=> (Participant-Function ?F) (And (Unary-Function ?F) (Domain ?F Model-Fragment) (Range ?F Entity))) (Domain ?F (Kappa (?X) (Or (Model-Fragment ?X) (Entity ?X)))) (<=> (Attribute-Function ?F) (And (Unary-Function ?F) (Domain ?F (Kappa (?X) (Or (Model-Fragment ?X) (Entity ?X))))))