@inproceedings{deploy399,
       booktitle = {Formal Methods for Components and Objects 2010},
           month = {November},
           title = {Shared Event Composition/Decomposition in Event-B},
          author = {Renato Silva and Michael Butler},
            year = {2010},
             url = {http://deploy-eprints.ecs.soton.ac.uk/399/},
        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.}
}

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