✦ LIBER ✦
On database queries involving competitive conditional preferences
✍ Scribed by P. Bosc; A. Hadjali; O. Pivert
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 177 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0884-8173
No coin nor oath required. For personal study only.
✦ Synopsis
This paper introduces a new type of database queries involving preferences. The idea is to consider competitive conditional preference clauses structured as a tree, of the type "preferably P 1 or • • • or P n ; if P 1 then preferably P 1,1 or . . .; if P 2 then preferably P 2,1 or . . . ," where the P i s are not exclusive (thus the notion of competition). The paper defines two possible interpretations of such queries and outlines two evaluation techniques which follow from them.