A ConnectorEnd is an endpoint of a Connector, which attaches the Connector to a ConnectableElement. Source Unified Modeling Language 2.5.1
Each Connector may be attached to two or more ConnectableElements, each representing a set of instances that contribute to the instantiation of the containing StructuredClassifier. Source Unified Modeling Language 2.5.1
In contrast to Associations, which specify links between any suitably-typed instance of the associated Classifiers, Connectors specify links between instances playing the connected roles only. Source Unified Modeling Language 2.5.1
Each link may be realized by something as simple as a pointer or by something as complex as a network connection, and may represent the possibility of instances being able to communicate because their identities are known by virtue of being passed in ... Source Unified Modeling Language 2.5.1
A Connector specifies links ... between two or more instances playing owned or inherited roles within a StructuredClassifier. Source Unified Modeling Language 2.5.1
