Question: K. P, Eswaran and D. D. Chamberlin. "Functional Specifications of a Subsystem for Data Base Integrity." Proc. 1st International Conference on Very Large Data Bases, Framing-ham, Mass. (September 1975). An early proposal for a set of integrity facilities for SQL. including ASSERT and DROP ASSERTION statements (analogous to our CREATE and DROP INTEGRITY RULE statements, but without a violation response); a DEFINE TRIGGER statement (analogous to our CREATE INTEGRITY RULE with such a response), and a corresponding DROP TRIGGER statement; and an ENFORCE INTEGRITY statement to force the checking of deferred rules without actually causing a COMMIT. Note: The term TRIGGER as used in this paper would more accurately be called a triggered procedure.