Editing OOD (section)

====Finding classes====
Since the analysis and design process is iterative the list of classes will change as time moves on. 
The Rational Objectory Process advocates finding classes for a system by looking for boundary, control and entity classes. These three stereotypes conform to the model-view-controller point of view.
An entity class models information and associated behavior that is generally long lived. They are often called domain classes since they usually deal with abstractions of real-world enitities.
Boundary classes handle the communication between the system surroundings and the inside of the system.
Control classes model sequencing behavior specific to one or more use cases. Control classes coordinate the event needed to realize the behavior specified in the use case. Control classes are usually application-dependent classes.