Associatrions

• An association is where objects are related to each other in some fashion
• For example a human object that watches a television object is associated to that television object
• In this situation, the association might be called turn on as the association begins when the human turns the TV on. This association is unidirectional
• Other associations such as marriage are bi-directional
• In some cases an object may be associated with another object in more than way.
• It is possible for a class of objects to be associated with one or more other classes
• Multiplicity is the specification of how many objects in one class relate to a single object of an associated class
• For example one lecturer teaches the students in this class, however many students are taught by this one lecturer