Title :
Modeling uncertainty in databases
Author :
Sadri, Fereidoon
Author_Institution :
Dept. of Comput. Sci., Concordia Univ., Montreal, Que., Canada
Abstract :
Relational algebra operations were extended to produce, together with answers to queries, information regarding sources that contributed to the answers. The author´s previous model is reviewed and the semantic interpretation is presented. It is shown that extended relational algebra operations are precise, that is, they produce exactly the same answers that are expected under the semantic interpretation. Algorithms for computing the reliability of answers to a query are also reviewed and their correctness under the semantic interpretation proposed is proved
Keywords :
artificial intelligence; relational databases; artificial intelligence; databases; queries; relational algebra; reliability; semantic interpretation; uncertainty modelling; Algebra; Artificial intelligence; Computer science; Database systems; Decision making; Probability; Prototypes; Relational databases; Solids; Uncertainty;
Conference_Titel :
Data Engineering, 1991. Proceedings. Seventh International Conference on
Conference_Location :
Kobe
Print_ISBN :
0-8186-2138-9
DOI :
10.1109/ICDE.1991.131459
