Bipolar Queries and Queries with Preferences

The concepts of bipolar queries and queries with preferences are studied. Various interpretations of the former, recently defined by Dubois and Prade, are discussed. The latter were defined by Chomicki together with a new relational algebra operator winnow. The fuzzy version of the winnow operator is proposed. It is shown how it may be used to express a selected interpretation of the bipolar queries.

• Type: Conference
• Year: 2006
• Where: DEXAW
• Authors: Slawomir Zadrozny, Janusz Kacprzyk
• Keywords: Algebra Operator Winnow, Bipolar Queries, Database, DEXAW 2006, Winnow Operator