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Messages (Timing Diagram)

Messages are the communication links between Lifelines in a Timing diagram. In the case of a Timeline, a Message is a connection between two Timeline objects.

A Message shown on a UML Timing diagram.

For example:

Use of Message on a UML Timing diagram.

The OMG Unified Modeling Language specification, (v2.5.1, figures 14.30 and 14.31, p.520.)

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Message connector

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