Silva, Renato and Butler, Michael
Shared Event Composition/Decomposition in Event-B
At FMCO Formal Methods for Components and Objects, Austria.
29 Nov - 01 Dec 2010.
The construction of specifications is often a combination of smaller sub-components. Composition and decomposition are techniques that support reuse and allow us to formally combine sub-components through refinement steps while reusing their properties. Sub-components can result from a design or architectural goal and a refinement framework should allow further parallel development over the sub-components. We propose the definition of composition and decomposition in the Event-B formalism following a shared event approach where sub-components interact via synchronisation over shared events and shared states are not allow. We define the necessary proof obligations to ensure a valid composition or decomposition. We also show that shared event composition preserves refinement proofs for sub-components, that is, in order to maintain refinement of compositions, it is sufficient to prove refinement between corresponding subcomponents. A case study applying these two techniques is illustrated using Rodin, the Event-B toolset.
Conference or Workshop Item
||Event Dates: 29 November - 1 December 2010
|Venue - Dates:
||FMCO Formal Methods for Components and Objects, Austria, 2010-11-29 - 2010-12-01
||Electronic & Software Systems
|30 November 2010||Published|
||13 Apr 2011 16:00
||17 Apr 2017 17:58
|Further Information:||Google Scholar|
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