Types, Subtypes, and ASL+
نویسنده
چکیده
ASL+ is a formalism for speciication and programming in-the-large, based on an arbitrary institution. It has rules for proving the satisfaction and reenement of speciications, which can be seen as a type theory with subtyping, including contravariant reenement for-abstracted speciications and a notion of stratiied equality for higher-order objects. We describe the syntax of the language and a partial equivalence relation semantics. This style of semantics is familiar from subtyping calculi, but a novelty here is the use of a hierarchy of typed domains instead of a single untyped domain. We introduce the formal system for proving satisfaction and reenement and describe how it is linked to proof systems of the underlying programming and speciication languages.
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تاریخ انتشار 1994