当需要依赖时，它们最好定义成通用业务流程、函数和数据模型，而不是实现构件(比如会话密钥)。
When dependencies are required, they are best defined in terms of common business processes, functions, and data models, not implementation artifacts (like a session key).
UML提供了通用IT语言来描述体系结构和设计构件，许多开发工具集都是以标准框架为基础构建的。
UML provides for the common it language to describe architecture and design artifacts, while many of the development toolsets are built on top of a standard framework.
对识别出的构件按照其重用的范围进行了层次的划分，给出了通用开发框架的模型。
The components identified are leveled according to its reusability, then the common development framework is given.
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