Key points are not available for this paper at this time.
In ARES, relational operations have been functionally augmented with an additional comparison operator. This operator 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 research toward implementation of highly intelligent data processing facilities beyond the present scope of database technology.
Ichikawa et al. (Thu,) studied this question.