System R is a database management system which provides a high level relational data interface. The systems provides a high level of data independence by isolating the end user as much as possible from underlying storage structures. The system permits definition of a variety of relational views on common underlying data. Data control features are provided, including authorization, integrity assertions, triggered transactions, a logging and recovery subsystem, and facilities for maintaining data consistency in a shared-update environment.This paper contains a description of the overall architecture and design of the system. At the present time the system is being implemented and the design evaluated. We emphasize that System R is a vehicle for research in database architecture, and is not planned as a product.

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System R: relational approach to database management

Casual and other users of large formatted data bases need a simple tabular (relational) view of the data rather than a network or tree-structured view. This paper illustrates the removal of repeating groups, hierarchic and plex structures, and cross-referencing structures. Finally, the simplification of data base relations by normalization is discussed.

Normalized data base structure: a brief tutorial

This paper deals with the history and definitions common to data-base technology It delimits the objectives of data-base management systems, discusses important concepts, and defines terminology for use by other papers in this issue, traces the development of data-base systems methodology, gives a uniform example, and presents some trends and issues

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Evolution of Data-Base Management Systems

This paper presents in tutorial fashion the concepts, notation, aud data-base languages that were defined by the CODASYL Data Description Language and Programming Language Committees. Data structure diagram notation is explained, and sample data-base definition is developed along with several sample programs. \" Advanced features of the languages are discussed, together with examples of their use. An extensive bibliography is included.

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Edgar H. Sibley

Papers

Feature analysis of generalized data base management systems: CODASYL Systems Committee, May 1971

Critique of the GUIDE-SHARE DBMS requirements

Preliminary discussion of a general data-to-storage structure mapping language

A survey of generalized data base management systems, May 1969

Information Resource/Data Dictionary Systems