Ben Shneiderman, Glenn Thomas. An Architecture for Automatic Relational Database System Conversion. ACM Trans. Database Syst., 7(2):235-257, 1982. [doi]
Changes in requirements for database systems necessitate schema restructuring, database translation, and application or query program conversion. An alternative to the lengthy manual revision process is proposed by offering a set of 15 transformations keyed to the relational model of data and the relational algebra. Motivations, examples, and detailed descriptions are provided.