An approach to achieving multi-user integrity in a knowledge base system

The implementation of security results in a user being restricted to a subset of a knowledge base. The information content of constraints may mean that a user is not permitted to access some constraints. But without access permission to all constraints, a user may make modifications which do not satisfy the integrity of other users in the knowledge base system. The author describes an approach which shows how users who have access to a subset of the knowledge base which does not satisfy all constraints can act to restore their subset to a state where the information satisfies all integrity constraints. The user may make modifications to restore integrity, may place information in a pending state, or may work with unaffected areas of the knowledge base