A formal software development method of using data refinement with two times is introduced, which from data refinement to process refinement then to data refinement.
提出了一种从数据精化、过程精化、再数据精化的两次数据精化的形式化软件开发方法。
B-method is a software formal method, which supports the whole lifecycle of software development from formal specification to code generation.
方法是一种软件形式化方法，支持从规格说明到代码生成的整个软件开发周期。
B method is one of the most popular formal methods at present, which supports the whole lifecycle of software development process, from specification to code generation.
B方法是目前国际上最受欢迎的软件形式化方法之一，它支持从规范说明到代码生成的整个软件开发周期。
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