Affiliation:
1. Nanjing University of Aeronautics and Astronautics, China
2. Northeastern University, China
Abstract
Imperfect information extensively exists in data and knowledge intensive applications, where fuzzy data play an import role in nature. Fuzzy set theory has been extensively applied to extend various database models and resulted in numerous contributions. The chapter concentrates on two main issues in fuzzy data management: fuzzy data models and fuzzy data querying based on the fuzzy data models. A full up-to-date overview of the current state of the art in fuzzy data modeling and querying is provided in the chapter. In addition, the relationships among various fuzzy data models are discussed in the chapter. The chapter serves as identifying possible research opportunities in the area of fuzzy data management in addition to providing a generic overview of the approaches to modeling and querying fuzzy data.
Reference146 articles.
1. IFO: a formal semantic database model
2. Alashqur, A. M., Su, S. Y. W., & Lam, H. 1989, OQL: A Query Language for Manipulating Object-oriented Databases. In Proceedings of the Fifteenth International Conference on Very Large Data Bases. Academic Press.
3. Extracting the extended entity-relationship model from a legacy relational database
4. An Object Algebra for Object-Oriented Database Systems;R.Alhajj;Database,1993
5. Modeling and Management of Fuzzy Information in Multimedia Database Applications