Use the Messages category to add or delete messages or edit existing ones.
Messages
Lists the messages you have defined for the association role.
To quickly edit the most commonly used settings for a message, click a field in the Messages list, and then select or type a value.
To access all of the settings for a message, select the message in the list, and then click Properties.
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Message The message name you type depends on how the resulting event is implemented. If an event is implemented with an operation call, type the name of the event raised in the target. If an event was implemented as a procedure call, type the name of the operation.
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Direction Choose a direction so that the message arrow points toward the target object.
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Flow Kind Choose the kind of message flow you want. The arrowhead varies with the type you choose.
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Procedure call is a nested flow of control in which the entire nested sequence is completed before the outer level sequence resumes.
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Flat means a flat flow of control in which the arrow shows the progression to the next step in sequence. Messages are usually asynchronous.
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Asynchronous indicates an explicitly asynchronous message between two objects in a procedural sequence.
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Sequence Expression Type a sequence expression for a message. In sequence diagrams, you can omit sequence numbers. In collaboration diagrams, message sequence numbers are usually nested to indicate levels. For example, message 3.1.4 follows message 3.1.3 within activation 3.1.
New
Click to add an undefined message to the list of messages.
To quickly edit the most commonly used settings for a message, click a field in the Messages list, and then select or type a value.
To access all of the settings for a message, select the message in the list, and then click Properties.
Duplicate
Click to add a new message to the list with the same property values as the selected message.
Delete
Click to delete the selected message from the list.
Move Up/Move Down
After you select a message under Messages, click to move the message higher in the list order.
Properties
After you select a message, click to display three categories where you can edit the property values associated with the message: Message, Constraints, and Tagged Values.
