Object Repository Classes track information about .NET and COM classes that belong to object repository objects, including licensing information associated with the class. When an object is created that is a COM object or .NET assembly, the system automatically detects the classes included within the object and adds Object Repository Classes records as necessary. Object Repository Classes Record 
The system automatically creates Object Repository Classes records. These records are used by other parts of the system to set licenses when dynamically loading controls. Note that an object's associated classes are listed under the object's Classes tab.