Architecting and designing > UML 2.5 > Model Elements > Structured Classifiers > AssociationClass
  
AssociationClass
An association class is a class that is part of an association relationship between two other classes. You can attach an association class to an association relationship to provide additional information about the relationship.
See also
Class
Activity
FunctionBehavior
Interaction
OpaqueBehavior
State Machine
Stereotype
Device
ExecutionEnvironment
Collaboration
Component
Node
Protocol State Machine
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Structured Classifiers