This image shows how to delete a descriptor. The top half of the image shows the Applications -Navigator window from the JDeveloper. The lower half is the TopLink Mappings - Structure window. The lower half contains a logical tree of elements. To the right of these windows, is a window showing the TopLink Mappings. The General tab is active (the only tab). It contains a field named Database Field containing SSN, an unselected check box labeled Read Only, an unselected check box labeled Use Method Accessing with two grayed out fields, Get Method and Set Method. Below this is an unselected check box labeled Use Default Value When Database Field is Null:, and two grayed out fields, Type and Value.