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In this paper we examine issues involving measures of creativity for attribute data generalization using hierarchies. In particular we consider consensus and specificity measures for the partitions that result using crisp concept hierarchies. We note that fuzzy hierarchies do not produce partitions of data in general so some approaches to considering degrees of partitioning is described.
The expression of user preferences into queries addressed to a relational database management system allows to obtain more appropriate answers. In this context, it is possible to consider fuzzy bipolar conditions which are made of two parts: (i) a fuzzy constraint to represent a mandatory requirement, (ii) a fuzzy wish to represent an optional requirement. Fuzzy constraints and fuzzy wishes express...
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