Data structures and accessing in data-base systems, Part III: Data representations and the data independent accessing model
by M. E. Senko, E. B. Altman, M. M. Astrahan, P. L. Fehder
Presented is the Data Independent Accessing Model (DIAM)-.a complete model for the representing, storing, and retrieving of structured information. DIAM is a hierarchy of models formed by the Entity Set Model and three lower modeling levels-e String Model, the Encoding Model, and the Physical Device Level Model.