4. The system set forth in claim 1 wherein: the model further includes representations of further information; and the interface permits the collaborator to view how the further information is related to the model entity and to view the further information.
4. The system set forth in claim 1 wherein: the model further includes representations of further information; and the interface permits the collaborator to view how the further information is related to the model entity and to view the further information. 5. The system set forth in claim 4 wherein: the interface further permits the collaborator to modify the further information.