Creation and Evaluation of Fuzzy Knowledge-base

In this paper we give a possible model for handling uncertain information. the concept of fuzzy knowledge-base will be defined as a quadruple of any background knowledge, defined by the proximity of predicates and terms; a deduction mechanism: a fuzzy datalog program; a connecting algorithm, which connects the background knowledge with the program and a decoding set of the program, which help us to determine the uncertainty level of the results. evaluation strategies will also be presented.