RDBAS: A relational database system for non-experienced users

Abstract

In the last years, the relational approach has developed into a very interesting foundation to the implementation of database management systems oriented towards small computers. This paper deals with a software tool for assisted access to databases using the relational model (RDBAS). A main design goal has been the elaboration of a system whose utilization by unexperienced users requires only a bit of learning effort. Working towards this goal, a non-procedural semi-graphic query language with relational processing capability has been implemented. This language is based on the domain relational calculus and can be used in an interactive way. An interesting feature of this system is the extensibility of its command repertory. Specific purpose new commands can be defined to be used, even by people who are unaware of the query language. Information structures and techniques used in implementation are also discussed.