Abstract
In UML 2.0 sequence diagrams have been considerably extended, influenced by Live Sequence Charts (LSCs), a very expressive extension of Message Sequence Charts (MSC) with liveness. Nonetheless, fundamental liveness properties can still not be expressed in the new sequence diagrams. In recent work, we have proposed to solve this by enriching sequence diagrams with a simple but powerful Object Constraint Language (OCL) template for liveness. In this paper, we show how to formalize our liveness-enriched sequence diagrams using Abstract State Machines.
Sequence diagrams still have several open problems. For example, the semantics of some of the newly introduced operators is ambiguous, and it is not clear how they can be used or combined with other operators. We address some of these issues in the paper.
Finally, a further advantage of using ASMs as a semantic model concerns synthesis. It is our ultimate goal to be able to synthesise automatically a state-based object system from our richer sequence diagrams. ASMs are a state-based and operational formalism which therefore eases this task considerably.
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Cavarra, A., Küster-Filipe, J. (2004). Formalizing Liveness-Enriched Sequence Diagrams Using ASMs. In: Zimmermann, W., Thalheim, B. (eds) Abstract State Machines 2004. Advances in Theory and Practice. ASM 2004. Lecture Notes in Computer Science, vol 3052. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-24773-9_6
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DOI: https://doi.org/10.1007/978-3-540-24773-9_6
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