%A Alexei Iliasov
%A Elena Troubitsyna
%A Linas Laibinis
%A Alexander Romanovsky
%T Towards Automated Re?nement: Patterns in Event B 
%X Formal modelling is indispensable for engineering highly dependable systems. However, a wider acceptance of formal methods is hindered by their insufficient usability and scalability. In this paper, we aim at assisting developers in rigorous modelling and design by increasing automation of development steps. We introduce a notion of re?nement patterns ? generic representations of typical correctness-preserving model transformations. Our definition of a re?nement pattern contains a description of syntactic model transformations, as well as the pattern applicability conditions and proof obligations for verification of correctness preservation. This establishes a basis for building a tool supporting formal system development via pattern reuse and instantiation. We present a prototype of such a tool and some examples of re?nement patterns for automated development in the Event B formalism. 

%C  
%D 2009
%I Technical Report
%L deploy106

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