OOAD包括建模概念，表示法，开发过程，经验规则。UML本身就是OO概念表示法，也就是说结合了建模概念和表示法。但它并不包含开发过程。在搭配UML的开发过程中，除了需要说明必要的开发步骤以外，还必须指出每个步骤将生成什样的UML图。最蓬勃发展的经验法则就是模式，每个模式针对一个特定的问题。-OOAD includes modeling concept, representation, development process, the experience rule. UML is the OO concept representation, that is combined with the modeling concepts and notation. But it doesn t contain the development process. With UML development process, in addition to the descr iption of the necessary development steps outside, still must point out each step will produce what kind of UML map. The vigorous development of the rule of thumb is mode, each mode in response to a specific problem.