Release 10.1A: OpenEdge Development:
Progress Dynamics Basic Development

Security model

The first step is to choose which security model is right for you application. Progress Dynamics performs access control by either revoking access or by granting access, but not both. All application functionality in a single Progress Dynamics Repository must use either the revoke security model or the grant security model.

With a revoke model, a user or group has unlimited access rights unless you specifically revoke rights from them. With the grant model, a user or group has no access rights unless you specifically grant rights to them. You must choose one or the other—you cannot have a mixed security model. The default is a revoke model. See OpenEdge Development: Progress Dynamics Administration for a discussion on which model is better suited for your Progress Dynamics application. The examples in this chapter mostly demonstrate the revoke model.

Note: If you define security using one security model and then decide you want to use the other security model, Progress Dynamics asks you to confirm that you want to change models and delete your current security allocations.