Concern-Driven Software Development

随着模型驱动工程(Model-Driven Engineering，MDE)的出现，软件开发被视为一个模型生产、提炼和集成的过程。模型是在软件开发生命周期的不同点或不同阶段为不同的目的使用最合适的建模形式主义(S)在手头任务的最合适的抽象级别(S)构建的，并定义了在这些模型之间建立关系的模型转换。实践证明，MDE可以显著降低软件开发成本。MDE在实践中没有被广泛使用的主要原因之一是缺乏模型重用。通常，正在开发的系统的模型是从头开始创建的，而不是重用已有的模型。这使得建模通常比编码更麻烦，因为现在大多数编程语言都提供了促进代码重用的广泛的库或框架。

With Model-Driven Engineering (MDE), software development is seen as a process of model production, refinement and integration. Models are built at different points or during different phases of the software development life cycle for different purposes using the most appropriate modelling formalism(s) at the most appropriate level(s) of abstraction for the task at hand, and model transformations are defined that establish relationships among these models. It has been shown that MDE can significantly lower the costs of software development. One of the main reasons why MDE is not widely used in practice is the lack of model reuse. Typically, models for a system under development are created from scratch, rather than reusing already existing models. This makes modelling often more cumbersome than coding, since most programming languages nowadays offer extensive libraries or frameworks facilitating code reuse.