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On Diverse Approaches to Bipolar Division Operators

✍ Scribed by P. Bosc; O. Pivert

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
124 KB
Volume
26
Category
Article
ISSN
0884-8173

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✦ Synopsis

Introducing preferences inside user queries has gained more and more acceptance during the past decade. Besides, it turns out that the concept of bipolarity is of interest for expressing queries in the sense that some requirements are mandatory and play the role of constraints, whereas other are solely desirable. In this paper, we investigate how bipolarity may impact the division operator in the context of relational databases. Various forms of bipolar divisions can indeed be devised, each of them conveying a specific semantics.

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