Object-Oriented Modeling with Events

Although in the object-oriented paradigm objects play the central role, putting events forward is not in contradiction with current object-oriented practice. Indeed, most object-oriented methods use a state and transition-based formalism to specify behavior such as finite state machines or statecharts [1, 2, 4, 5, 6, 8]. In such formalisms the different states of an object are taken as starting point and the transitions describe how objects can go from one state to another. The triggers of these transitions are events.