Opcat ll OnStar 口回☒ System Edit View Notation Operation Generation Help 色取旧马面血由国自。XJ图Q只业2 OPD Hierarchy 日sD口'广☒ onStar 田SD Driver Rescuing 0- Driver Rescuing is physical. Things in OPD Things List Meta Models OPL Generator Testing ▣Oo ▲△△A→PPP☑P Figure 6.Driver Rescuing,the main function of the system, has been inserted as a physical process. 3.5 Defining and linking the system's main objects Having defined the major system function,we now turn to depicting the main objects in the system.We need to think first who is the beneficiary of the system,i.e.,who gets value from the systems.Obviously,it is the driver,so we insert Driver as a physical object.Since the driver is not part of the system,but interacts with it,its affiliation is environment rather than system,so we mark both radio buttons and get the OPL sentence: Driver is environmental and physical. Another vital object in the mode is the OnStar System,which we also add as a physical object.Figure 7 shows SD,the System Diagram,after the objects Driver and OnStar System were added. 99 Figure 6. Driver Rescuing, the main function of the system, has been inserted as a physical process. 3.5 Defining and linking the system's main objects Having defined the major system function, we now turn to depicting the main objects in the system. We need to think first who is the beneficiary of the system, i.e., who gets value from the systems. Obviously, it is the driver, so we insert Driver as a physical object. Since the driver is not part of the system, but interacts with it, its affiliation is environment rather than system, so we mark both radio buttons and get the OPL sentence: Driver is environmental and physical. Another vital object in the mode is the OnStar System, which we also add as a physical object. Figure 7 shows SD, the System Diagram, after the objects Driver and OnStar System were added