本文首先利用顶级活动关系图对应用程序高层活动进行描述，这样可使读者对应用程序活动建立概括性了解，然后，以图文结合的方式详细讲解应用程序提供的功能。-In this paper, the first to use top-level activity diagram of the application to describe high-level activities, so that readers of the application to establish a general under

UML活动图的软件，基于面向对象思想。有搜索路径的功能。-UML activity diagram of the software, based on object-oriented thinking. A search path functionality.

It is a document about credit card processing system.It includes the scope of credit card processing system,its purpose,funtional requirements.It also includes the state diagram,usecase diagram,activity diagrams describing the system.A sample code is

Activity diagram for secured sysytem