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Refining Nodes and Edges of State Machines

Hallerstede, Stefan and Snook, Colin (2011) Refining Nodes and Edges of State Machines. In: ICFEM 2011: 13th International Conference on Formal Engineering Methods.

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State machines are hierarchical automata that are widely used to structure complex behavioural specifications. We develop two notions of refinement of state machines, node refinement and edge refinement. We compare the two notions by means of examples and argue that, by adopting simple conventions, they can be combined into one method of refinement. In the combined method, node refinement can be used to develop architectural aspects of a model and edge refinement to develop algorithmic aspects. The two notions of refinement are grounded in previous work. Event-B is used as the foundation for our refinement theory and UML-B state machine refinement influences the style of node refinement. Hence we propose a method with direct proof of state machine refinement avoiding the detour via Event-B that is needed by UML-B.

Item Type:Conference or Workshop Item (Paper)
Additional Information: Event Dates: 26th--28th October 2011
Uncontrolled Keywords:Refinement State Machines
Subjects:Methodology > Refinement
ID Code:428
Deposited By: Colin Snook
Deposited On:23 Jul 2012 09:55
Last Modified:23 Jul 2012 09:55

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