Concepts of a Data Independent Accessing Model

ABSTRACT

The Data Independent Accessing Model (DIAM) represents a constructive combination of the formal mathematical and the evolutionary pragmatic approaches to a Generalized Data Base Management System. It aims at a complete separation between the user's (application programmer's) model of real-world objects, events, and the relationships among them, and the internal representation of those objects, events, and relationships. At the same time, it aims at complete flexibility of internal representation in terms of simple specifications, the effects of which are easy to understand. The DIAM encompasses four levels of descriptive models (Figure 1), each providing for flexible augmentation of the descriptions of the preceding level. Specifications at each level are retained in a catalog.

REFERENCES

• 1: E. B. Altman , M. M. Astrahan , P. L. Fehder , M. E. Senko, Specifications in a Data Independent Accessing Model, Proceedings of 1972 ACM-SIGFIDET workshop on Data description, access and control, p.363-382, January 1972 [doi>10.1145/800295.811498]
• 2: Davies, C. T., A Logical Concept for the Control and Management of Data, IBM Report AR-0803-00, Poughkeesie, New York, March 13, 1967.
• 3: Engles, R. W., A Tutorial on Data Base Organization, IBM Report TR 00.2004, Poughkeepsie, New York, March 20, 1970.
• 4: Meltzer, H. S., Data Base Concepts and Architecture for Data Base Systems, IBM Report to SHARE Information Systems Research Project, August 20, 1969.

INDEX TERMS

Primary Classification:
  H. Information Systems
  H.2 DATABASE MANAGEMENT

Additional Classification:
  H. Information Systems
  H.2 DATABASE MANAGEMENT
      H.2.1 Logical Design
          Subjects: Data models
      H.2.2 Physical Design
          Subjects: Access methods

General Terms:
Management