A deductive database audit trail

Database audh trails record each morMication to data values, and thus assist management in controlling 6nattcird losses atu%r legal vulnerability. Most commercial databasea lack integrated audh mail mechanaims. While tiggers ptuvide a means for a database administrator to implement an audit trail, they impose a specific spsn of coverage, and generally require progrdng to effect a change in audit trail policies. The emergence of deductive databases, such as LDL, makes possible the &sign of mechanisms for audit trail administration that are both more powerful and more elegant, as ilhtsmated herein.