Please note : This help page is not for the latest version of Enterprise Architect. The latest help can be found here.
Change the Timing Details
It is possible to change the timing details of a Message in a Sequence diagram.
Right-click on the Message | Timing Details
See the OMG UML specification (UML Superstructure Specification, v2.1.1, p. 511).
In this diagram, on the Open Order Message:
- 'Duration Constraint' has been set to 0...13
On the Get Cart Message:
- 'Duration Constraint Between Messages' has been set to d...d*3
- 'Duration Observation' has been set to d=duration
- 'Timing Constraint' has been set to t...t+3
- 'Timing Observation' has been set to t=now
By typing a value in the 'Duration Constraint' field, you enable the Message angle to be adjusted. After clicking on theon the 'Timing Details' dialog, click on the head of the Message connector and drag the connector up or down to change the angle. You cannot extent the angle beyond the life line of the connecting sequence object or create an angle of less than 5 degrees.
You can also create the 'Duration Constraint Between Messages' line by dragging the 'General Ordering' arrow up to the point at which the previous message joins the source Lifeline for the current message. A dialog displays on which you enter the value for the constraint. Having created the line, you can move it to any point within half way along the current message and half way along the previous message, to avoid overlap with other message timing details. You can edit or delete the value either through the 'Timing Details' dialog or by right-clicking on the line itself and selecting the appropriate context menu option.
Indicate the minimum and maximum limits on how long a message can last.
Duration Constraint Between Messages
Indicate the minimum and maximum interval between sending or receipt of the previous message at the current message's source Lifeline, and sending the current message.
Capture the duration of a message.
Indicate the minimum and maximum time at which the message should arrive at the target.
Capture the point at which the message was sent.