A view is a representation of the system from the perspective of a set of issues (the viewpoint).
A view is what we see of a particular system, while the viewpoint is the angle from which the system
is looked at. Viewpoints are defined generically (independently of any particular system). Figure 5.3
shows two viewpoints and six views, each related to one of the viewpoints and each providing a par-
ticular representation of the same system.