UML统一建模语言是一种可视化的建模语言，它能够让系统构造者用标准的、易于理解的方式建立起能够表达他们设计思想的系统蓝图，并且提供一种机制，以便于不同的人之间有效的共享和交流设计成果。

-UML is a visual modeling language, its structure can allow the system to use standard, easy-to-understand manner can set up to express their thought system design blueprint, and to provide one kinds of mechanisms in order to facilitate the different between people to share and communicate effective design results.