Declaratively building behavior by means of scenario clauses

Behavior needs to be understood from early stages of software development. In this context, incremental and declarative modeling seems an attractive approach for closely capturing and analyzing requirements without early operational commitment. A traditional choice for such a kind of modeling is a logic-based approach. Unfortunately, in many cases, the formal description and validation of properties result in a daunting task, even for trained people. Moreover, some authors established some practical limitations with temporal logics expressive power. In this work, we present omega-feather weight visual scenarios ($$\omega$$ź-FVS) a declarative language, not founded on temporal logics, but on simple graphical scenarios, powerful enough to express $$\omega$$ź-regular properties. The notation is equipped with declarative semantics based on morphisms, and a tableau procedure is given enabling the possibility of automatic analysis.