说明：  UML( Unified Modeling Language )是一种定义良好，易于表达，功能强大且普遍实用的建模语言。它溶入了软件工程领域的新思想、新方法和新技术。它不仅可以支持面向对象的分析与设计，更重要的是能够有力地支持从需求分析开始的软件开发的全过程。需要说明的是，UML是一种建模语言，而不是一种方法。
(UML (Unified Modeling Language) is a good definition. easy Expression, powerful and universal practical modeling language. Its integration into the software engineering field of new ideas, new methods and new technologies. It will not only support the object-oriented analysis and design, more important is the ability to effectively support the needs analysis from the beginning of the software development process. Need to note is that the UML is a modeling language, and not a method.)