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Event-Based Semantics of uml 2.x Concurrent sequence diagrams for Formal Verification

Journal of Computer Science & Technology 2022年第1期37卷 4-28页

作者： Inès Mouakher Fatma Dhaou J.Christian Attiogbé Faculty of Sciences of Tunis University of Tunis El Manar1068TunisTunisia Institute of Technology University of Nantes44322NantesFrance

uml 2.x sequence diagrams(SD)are among privileged scenarios-based approaches dealing with the complexity of modeling the behaviors of some current ***,there are several issues related to the standard semantics of uml 2.x SD proposed by the Object Management Group(OMG).They mainly concern ambiguities of the interpretation of SDs,and the computation of causal relations between events which is not specifically laid ***,SD is a semi-formal language,and it does not support the verification of the modeled *** justifies the considerable number of research studies intending to define formal semantics of uml *** proposed in our previous work semantics covering the most popular combined fragments(CF)of control-flow ALT,OPT,LOOP and SEQ,allowing to model alternative,optional,iterative and sequential behaviors *** proposed semantics is based on partial order theory relations that permit the computation of the precedence relations between the events of an SD with nested *** also addressed the issue of the evaluation of the interaction constraint(guard)for guarded CFs,and the related synchronization *** this paper,we first extend our semantics,proposed in our previous work;indeed,we propose new rules for the computation of causal relations for SD with PAR and STRICT CFs(dedicated to modeling concurrent and strict behaviors respectively)as well as their ***,we propose a transformational semantics in *** modeling approach emphasizes computation of causal relations,guard handling and transformational semantics into *** transformation of uml 2.x SD into the formal method Event-B allows us to perform several kinds of verification including simulation,trace acceptance,verification of properties,and verification of refinement relation between SDs.

关键词： uml 2.x sequence diagram formal semantics nested combined fragment partial order theory Event-B

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