Question: 16.9 G. Cardarin and M. Melkan off. "Proving Consistency of Database Transactions." Proc. 5th International Conference on Very Large Data Bases, Rio de Janeiro, Brazil (October 1979). Presents a technique for verifying at compilation time that transactions cannot violate any integrity rules. The technique is based on Hoare's axiomatic approach to program correctness. It is suggested that such a technique could form the basis for a generalized compilation-time "transaction consistency verifier."