Abstract
In these days, many fuzzy database systems (FDBS) which can handle imprecise information by using fuzzy logic, have been proposed. But few FDBSs were designed considering the difference of uncertainty which we could observe among users' subjectivities. It is clear that each user has his/her unique subjectivity, and conventional FDBSs cannot be suitable for every users' subjective fuzziness. In this paper, we propose a FDBS which can automatically tune each user's membership functions which represent their subjective fuzziness. In addition, our system can handle nonnumerical fuzzy attributes, like "beauty", as well as numerical fuzzy attributes like "young".
