| http://www.w3.org/ns/prov#value | - dula and Biba models formultilevel systems, the development of a flexible access control mechanism, one which can bridge the semantic gap between the customer's security policy and the access control mechanism, has not been forthcominq.Traditional discretionary security mechanisms for granting, revoking and denying access of a user to objects such as a database are usually based on either Access C
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