DocumentCode
2581731
Title
Bipolar Queries and Queries with Preferences (Invited Paper)
Author
Zadrozny, Slawomir ; Kacprzyk, Janusz
Author_Institution
Syst. Res. Inst., Polish Acad. of Sci., Warszawa
fYear
0
fDate
0-0 0
Firstpage
415
Lastpage
419
Abstract
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 was 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
Keywords
fuzzy set theory; query processing; relational algebra; bipolar query; query with preference; relational algebra operator winnow; winnow operator fuzzy version; Algebra; Expert systems; Fuzzy sets; Information technology; Rail transportation; Relational databases;
fLanguage
English
Publisher
ieee
Conference_Titel
Database and Expert Systems Applications, 2006. DEXA '06. 17th International Workshop on
Conference_Location
Krakow
ISSN
1529-4188
Print_ISBN
0-7695-2641-1
Type
conf
DOI
10.1109/DEXA.2006.36
Filename
1698377
Link To Document