Title :
On the treatment of imperfect information in intelligent databases
Author :
Nakata, Michinori ; Resconi, Germano ; Murai, Tetsuya
Author_Institution :
Dept. of Inf. Sci., Chiba-Keizai Coll., Chiba, Japan
Abstract :
A relational data model is extended under a modal logic approach so that it can deal with different kinds of imperfect information. In the extended model the imperfect information is uniformly represented in a set of possible worlds and an accessibility relation. This leads to the extended data model having the same operations to different kinds of imperfect information. Moreover, the model can support flexible queries. The approach gives fundamentals to integrate different kinds of databases handling different types of imperfect information
Keywords :
database theory; deductive databases; formal logic; information theory; query processing; relational databases; accessibility; data model; flexible queries; imperfect information; intelligent databases; modal logic; relational database; Data engineering; Data models; Database systems; Deductive databases; Educational institutions; Fuzzy set theory; Information science; Logic; Relational databases; Systems engineering and theory;
Conference_Titel :
Knowledge-Based Intelligent Electronic Systems, 1998. Proceedings KES '98. 1998 Second International Conference on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-4316-6
DOI :
10.1109/KES.1998.725968
