Association: Models a semantic connection among classes
Aggregation: A special form of association that models a whole-part relationship between an aggregate (the whole) and its parts
Composition:A form of aggregation with strong ownership and coincident lifetimes(The parts cannot survive the whole/aggregate)
Aggregation: A special form of association that models a whole-part relationship between an aggregate (the whole) and its parts
Composition:A form of aggregation with strong ownership and coincident lifetimes(The parts cannot survive the whole/aggregate)