associative classes . Use when a class is required to define a relationship. • Somewhere, an additional relationship is required to show ownership. (The one between person and Ticket in the current example).

associative classes . Use when a class is required to define a relationship. • Somewhere, an additional relationship is required to show ownership. (The one between person and Ticket in the current example).

Associative classes are used when it is useful to keep information about the association itself.Associative classes are common in many to many associations.