Local Pre/Post Conditions

Actions can be further defined with pre-condition and post-condition notes, which constrain an Action's entry and exit. These notes can be added to an Action as defined below.

See UML Superstructure Specification, v2.1.1, Figure 12.32, p. 316.

Create a Constraint

To attach a constraint to an Action follow the steps below:

1. Right-click on the Action. The context menu displays:
2. Select the Add | Constraint menu option. A Note is created on the diagram, connected to the Action.
3. Right-click on the Note. The context menu displays.
4. Select the View Properties menu option. The Constraint dialog displays.
    
   
    
5. In the Constraint Type field, click on the drop-down arrow and select the required constraint type.
6. In the Constraint field, type the text for the constraint.
7. Click on the OK button to save the constraint.