Object-oriented real time systems modeling and verification
نویسندگان
چکیده
An object-oriented real t i m e sy s t ems conceptual modeling approach is described. In this approach, each object is specified by a n object type, consisting of supertypes (inheritance), component types (aggregation), attributes, operations, s tat ic constraints, and t imed temporal constraints. An object type specification def i nes a theory of a type of objects. In particular, t he s tat ic constraints define t h e valid s tates of t he objects, t he operations define t h e valid s tate transi t ions each consisting of a set of execut ion rules. E a c h execution rule consists of a precondi t ion and a postcondition. T h e t imed temporal constraints define the permissible sequences of s tate transi t ions. A t o m i c and composate object s tate diagrams (AOSD and COSD) are t h e n constructed f r o m a f o r m a l specification f o r verif ication of t h e satisfiability of t he t imed temporal constraints. K e y words: Object-Oriented, Real T i m e S y s t e m s , Modeling, Verif ication, Formal Methods.
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