This paper will present the case for using a formal component-based specification technique for reactive systems, such as the Object Calculus of Fiadeiro and Maibaum. The Object Calculus provides a modular, highly declarative and abstract specification language, suitable for refinement using model-based design notations such as B or VDM. In the Object Calculus, pre/post style specifications of the effect of actions can be given, together with temporal logic specifications of expected histories of behaviour of the system. Keywords: Temporal logic, Reactive systems, Program specification, Object Calculus, Specification languages. Workshop Goals: Investigate application of formal specification in component-based systems, particularly reactive systems. 1 Background Temporal logic is an established technique for the specification of reactive systems: it has the advantage of being declarative and supporting reasoning, and it is sufficiently expressive for many practical cases. The..
