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Combines fuzzy logic and semantic techniques to perform flexible queries in a relational database.Alternative method to fuzzy logic, to execute flexible queries on non-scalar attributes.Answers are ordered according with the accomplishment degree to the ...

The division operator is well known in the context of fuzzy relational databases. Fuzzy approaches to this operator can be found in the literature to solve flexible queries: these approaches try to compute to which extent each element of a candidate set ...

The concept of a bipolar query, meant as a database query that involves both negative and positive conditions, is discussed from the point of view of flexible database querying and modeling of more sophisticated intentions and preferences of the user. ...

In this paper, we discuss an approach for relaxing a failing query in the context of flexible (or fuzzy) querying. The approach relies on the notion of a parameterized proximity relation which is defined in a relative way. We show how such a proximity ...

This paper deals with the issue of data fusion, which arises once reconciliations between references have been determined. The objective of this task is to fusion the descriptions of references that refer to the same real world entity so as to obtain a ...

In this paper, we present a cooperative approach to deal with empty answers in the case of fuzzy conjunctive queries by refereing to the Formal Concept Analysis theory. We present an architecture combining databases with this theory. In this ...

In traditional database management systems, imprecision has not been taken into account so one can say that there is some sort of lack of flexibility. The main cause is that queries retrieve only elements which precisely match to the given Boolean ...

When retrieving and searching desired data over large databases accessible in the web, users might be confronted with two common problems: overabundant answers and empty answers. In the former, the user is provided with an avalanche of responses that ...

The role and properties of the division are very well known in the context of queries addressed to regular relational databases. However, Boolean queries whose result is expressed in terms of all or nothing may turn out to be too limited to answer ...

The role and properties of the division operator are well known in the framework of queries addressed to regular relational databases. However, Boolean queries may turn out to be too restrictive to answer some user needs and it is desirable to consider ...