Issue No. 05 - May (1986 vol. 12)
Tadao Ichikawa , Faculty of Engineering, Hiroshima University, Shitami, Saijo-cho, Higashi-Hiroshima 724, Japan
Masahito Hirakawa , Faculty of Engineering, Hiroshima University, Shitami, Saijo-cho, Higashi-Hiroshima 724, Japan
As the social demand on database utilization expands, database systems are being directly handled more and more by non-professionals. In this field, it is important that friendly user-interfaces are provided. It has been found that nonprocedural ways of describing queries such as QBE are preferred. A further step toward attaining a higher degree of user-friendliness would be the development of a way of enabling the system to perform a flexible interpretation of queries usually specified definitely by the user. A flexible interpretation is necessary so that data items which are semantically close to an exact match with the query conditions can be obtained. This paper presents a relational database system, ARES, which has the capability of performing a flexible interpretation of queries. In ARES, relational operations have been functionally augmented with an additional comparison operator = which implies “approximately equal to” or “similar to” for cases in which the user expects the system to perform a flexible interpretation of the query conditions. The functional augmentation is simply achieved by a combination of conventional relational operations. ARES is now in actual operation in a research environment, and will contribute to the next step of our research toward implementation of highly intelligent data processing facilities beyond the present scope of database technology.
Algebra, Semantics, Strontium, Relational databases, Estimation, Data models, similarity relation, Data similarity, query representation/transformation, relational algebra, relational database, similarity graph
T. Ichikawa and M. Hirakawa, "ARES: A relational database with the capability of performing flexible interpretation of queries," in IEEE Transactions on Software Engineering, vol. 12, no. , pp. 624-634, 1986.