Prerequisites
By activating the classes separately, you have the advantage that the persistent class and corresponding CA class can be enhanced independently from one another.
Procedure
When you activate the CL class, the CB class is also activated.
The system displays a list of inactive objects on which all subobjects of the CA class are selected.
Result
The system displays all components of the CB class and CA class in the Class Builder. You can generate instances of these classes after activating the CL and CA classes.
See also:
Class Diagram: After Activation Inactive Sources Activating Classes and Interfaces