Connector Constraints

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A UML connector can also have associated constraints placed on it. Constraints tell us something about the rules and conditions under which a relation operates. For example, it might be a pre-condition that a customer is of a certain type before an association link to an Account is allowed.

Tip: Constraints about an association (connector) can be added to further refine the model. Constraints detail the business and operational rules for the model.

Set Constraints on a Link

To set constraints on a link, follow the steps below:

1.Double-click on a connector to open the Connection Properties dialog.
2.Select the Constraints tab.
3.Fill in details of the constraint(s) that apply and click on the Save button.




Name of constraint.


The type of constraint (eg. pre-condition).


Notes about the link.

Defined Constraints

A list of constraints for this link.