IMS 91, held in Kyoto, Japan, April 1991, was the first in a series of workshops on research issues in data engineering, each to precede the annual International Conference on Data Engineering. This proceedings volume contains 30 full length papers, 27 short papers, and two invited papers, one on the Interoperability Project carried out at Microelectronics and Computer Technology Corporation in Austin, Texas, and the other on the Japanese Project on Database Interoperability. No index. Acidic paper. Annotation copyright Book News, Inc. Portland, Or.