… objects differing only in the morphisms is presented. The first one is used to explain object
… ) and the strictest form of specialization (subtyping). The second category is shown to be …

… on subtyping relationships determined by the structure of object … In this paper,we explore
why inheritance-based subtyping … both inheritance-based and structural subtyping relations. In …

… One way of expressing the most flexible sound rule for S to be a behavioral subtype of T
is to require that for all subtype objects self : S, the precondition rule (3) holds and …

… uses inheritance of specifications to force the appropriate behavior on the subtype objects. …
But the semantic conditions need to be verified and are generally beyond the power of most …

Type inheritance is that phenomenon according to which we can say, for … a subtype of
rectangles, and rectangles are a supertype of squares. Recognizing and acting upon such subtype/…

… Further consideration of composite objects is beyond the … subtyping inheritance. A sequel
to this paper extends the definition of subtyping and describes other incremental inheritance …

… programming styles, including mixtures of object-oriented programming and programs built
… inheritance mechanisms for each. In order to support binary operations on objects within this …

… object-oriented systems a clear distinction ought to be made between two important concepts:
inheritance and subtyping… are other uses of inheritance beyond specialization that can be …

… with cancellation (exceptions) Traditional inheritance usually focuses on subtypes or
subclasses … Our structural relations go beyond is-a and is-not relations to include a variety of …

… Subtyping and inheritance introduce another original feature, ie run-time subtype checks,
which … A detailed presentation of coloring is beyond the scope of this paper and readers are …