The Need for Relationships

I l @ ve RuBoard

All systems are made up of many classes and objects. System behavior is achieved through the collaborations of the objects in the system. For example, a student is added to a course offering when the course offering receives the add student message. This is often referred to as an object sending a message to another object. Relationships provide the conduit for object interaction. Two types of relationships discovered during analysis are associations and aggregations.

I l @ ve RuBoard