Silva, Renato and Butler, Michael (2010) Shared Event Composition/Decomposition in Event-B. In: Formal Methods for Components and Objects 2010, November 2010, Graz, Austria.
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Official URL: http://www.informatik.uni-trier.de/~ley/db/conf/fmco/fmco2010.html
Abstract
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.
Item Type: | Conference or Workshop Item (Paper) |
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Subjects: | Event-B Methodology > Refinement Methodology > Composition and reuse Tool developments > Model construction Tool developments > Rodin plug-ins |
ID Code: | 399 |
Deposited By: | Renato Silva |
Deposited On: | 16 May 2012 08:21 |
Last Modified: | 18 May 2012 14:16 |
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