Fuzzy functional dependency (FFD) is a kind of semantic knowledge and can be discovered from a large volume of business data. Sectional FFD and Attribute FFD are discussed so as to reflect semantics of the business world and express useful information that is natural for people to comprehend. The experimental results on an insurance data set show that the proposed method can extract knowledge efficiently and effectively.
Wang, Xue and Chen, Guoqing, "Discovering Fuzzy Functional Dependencies as Semantic Knowledge in Large Databases" (2004). ICEB 2004 Proceedings. 206.