Date: 07 Sep 2005

The B method and the B toolkit

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Abstract

The B Method is a full spectrum formal software development method that covers the software process from specification to implementation. The method uses state machines, defined using logic and set theory with a notation similar to that of Z, that export operations. The method supports a notion of refinement and implementation, which is based on the notion of refinement in the refinement calculus with the exception that there is no distinction between procedural and data refinement. The B Toolkit is a configuration tool that manages developments under the B Method, generating proof obligations and supporting tools for the discharge of those proof obligations. There is also support for the generation of documentation, and for the browsing of developments.