Creating a primary identifier when you create the class attributes

You can create a primary identifier when you create attributes for a class.

1. Double-click a class in the diagram to display its property sheet, and then click the Attributes tab.
2. Double-click an attribute in the list to display its property sheet, and then click the Detail tab.
3. Select the Primary Identifier check box and click OK to return to the Attributes tab of the class property sheet.
   
   
   
4. Click the Identifiers tab to view the new identifier in the list.
5. Click OK.