Refinement is only supported by providing three different kinds of policy objects. These follow the three levels of policies as described in [Koch 97]. There is no refinement process in terms of a description or computer support. The focus of the system is the enforcement and for this purpose an automated enforcement of obligation policies6.6 is implemented.
For this reason, the implementation of metapolicies provides control in the areas of refinement and enforcement. This allows the specification of metapolicies in the categories refinement, conflict, exception, and enforcement.