Role Static Property
As for an attribute, it is possible to specify if a role can take specific values for each class instance, or take a value characterizing the entire class:
1. Open the properties dialog box of the role.
2. Click the Characteristics tab.
3. In the Static box, select:
• “Yes”: so that the role can take a value characterizing the entire class.
• “No”: so that the role can take a different value for each class instance.