Compound bipolar queries: combining bipolar queries and queries with fuzzy linguistic quantifiers

Abstract

We propose a conceptually new type of bipolar queries meant as those in which a required condition, to be necessarily satisfied, and desired condition, to be satisfied if possible, are included. In the new type of bipolar queries, termed compound bipolar queries, both the required and desired conditions have been assumed to be queries with fuzzy linguistic quantifiers as introduced in the earlier works of the authors. We propose a logical formulation of the resulting compound bipolar queries for which a truth value can be calculated. The new type of a bipolar query proposed is a further step towards a higher human consistency of database queries to be employed by non-expert human users of an obvious limited command of database querying.

Contextual bipolar queries: “or if impossible” operator case

“…Possible applications of the considered operators are multitude. Some of them has been already explored in [12,13] and [2] but this is just the beginning.…”

“…Thus, referring to (12), the condition P corresponds now to belonging to a preferred hotel chain (to a degree) while the condition C corresponds to the hotel location safety status and is represented by a fuzzy set being a complement of the fuzzy set defined in the space of San Francisco's neighborhoods, mentioned above. A tuple (hotel) satisfies such a bipolar query (to a high degree) if either of the two conditions holds:…”

“…A further step towards a better representation of the user preferences and intentions may be bipolar queries. The concept has been originally introduced by Dubois and Prade [5] and then further developed by many authors including Dubois and Prade themselves [6,7,8,9], Kacprzyk and Zadrożny [10,11,12,13], De Tré and his team [14,15,16], Bosc and Pivert [17,18,19], Lietard with collaborators [20,21],etc. The idea behind this concept is to consider independently the negative and positive aspects of (conditions on) the data sought.…”

A novel approach to hierarchical contextual bipolar queries: A winnow operator approach

“…Now, by following the argument for the hierarchical bipolar queries, proposed by Kacprzyk and Zadrożny (2013a) (see also a related concept of a compound bipolar query, cf. Kacprzyk and Zadrożny, 2013b, 2017, 2018, 2019, we will present how the degrees of truth for particular tuples are calculated for the contextual bipolar queries in a hierarchical context. We will follow, for clarity and intuitive appeal, a very illustrative real estate example.…”