Plan and Diplan (Theory)

Chapters 3 and 4 were devoted to establishing the concepts — or if you prefer, the UNITS — of ACTION and BODY. In this Chapter we shall develop means for describing larger UNITS of organized activity in an organized physical setting, UNITS built of many ACTIONS and many BODIES. In effect, this means developing a language for the writing of plans. The plan language to be developed below is graphical, and (as you already know) is called Diplan. The graphical conventions introduced in Chapter 4 are (of course) the beginning of Diplan.