1. A method, comprising: by a processor operating at a policy enforcement point (PEP): obtaining at least one defined service level policy to be enforced during runtime by the PEP, that each specifies at least one set of enforceable policy provisions that each comprises a policy subject that represents a policy entity with which the defined service level policy is associated, a reference to a policy domain that specifies service level semantics of an area of runtime policy enforcement, and at least one assertion that each specifies a policy enforcement constraint to be applied to runtime objects associated with the policy subject within the area of runtime policy enforcement; parsing the obtained at least one defined service level policy to identify the specified at least one set of enforceable policy provisions; and transforming each identified set of enforceable policy provisions of the obtained at least one defined service level policy into at least one runtime-executable processing rule that each comprises at least one PEP processing action that each represents an atomic unit of policy enforcement level behavior executable by the PEP to enforce the respective at least one assertion against the runtime objects associated with the policy subject within the area of runtime policy enforcement.