It extends the concept of the int eractive model in UML ,appends the information that relates the generation of G UIs directly and represents the information of function and data processing and the control relation between these information.

• 它对UML中交互模型的概念加以扩展,添加与界面生成直接相关的信息,表达了与界面相关的功能和数据对象信息以及这些信息间的控制关系。