Fuzzy sets, uncertainty, and information
Fuzzy sets, uncertainty, and information
Information modeling: the EXPRESS way
Information modeling: the EXPRESS way
Loss of data semantics in syntax directed translation
Loss of data semantics in syntax directed translation
Imprecision and uncertainty in the UFO database model
Journal of the American Society for Information Science - Special issue: management of imprecision and uncertainty
Design and implementation issues in the fuzzy object-oriented data model
Information Sciences—Informatics and Computer Science: An International Journal
Assessment of data redundancy in fuzzy relational databases based on semantic inclusion degree
Information Processing Letters
Reasonable properties for the ordering of fuzzy quantities (I)
Fuzzy Sets and Systems
Reasonable properties for the ordering of fuzzy quantities (II)
Fuzzy Sets and Systems
Practical Applications of Fuzzy Technologies
Practical Applications of Fuzzy Technologies
Foundations of Databases: The Logical Level
Foundations of Databases: The Logical Level
Targeted E-commerce Marketing Using Fuzzy Intelligent Agents
IEEE Intelligent Systems
Entity-Relationship Modeling and Fuzzy Databases
Proceedings of the Second International Conference on Data Engineering
Extending object-oriented databases for fuzzy information modeling
Information Systems - Databases: Creation, management and utilization
Advances In Fuzzy Object-oriented Databases: Modeling And Applications
Advances In Fuzzy Object-oriented Databases: Modeling And Applications
Uncertainty management issues in the object-oriented data model
IEEE Transactions on Fuzzy Systems
Relaxing constraints in enhanced entity-relationship models using fuzzy quantifiers
IEEE Transactions on Fuzzy Systems
Conceptual design of object-oriented databases for fuzzy engineering information modeling
Integrated Computer-Aided Engineering
Extending engineering data model for web-based fuzzy information modeling
Integrated Computer-Aided Engineering
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Information that has imprecision and uncertainty is inherently present in engineering design and manufacturing. The product data model, being a core model of the intelligent manufacturing system, consists of all concerned data in the product life cycle. It is possible that crisp data as well as imperfect data are involved in the product data model. EXPRESS is a powerful tool with which to develop a product data model and should be extended for this purpose. In this paper, we focus on extending the parts of EXPRESS related to the aspects of database modeling with fuzzy sets and possibility distributions, and implementing such fuzzy EXPRESS models with databases. Formal methods for mapping the fuzzy EXPRESS models to the fuzzy object-oriented databases are proposed. The requirements of standard data access interface (SDAI) functions are investigated to manipulate the EXPRESS-defined data in the databases. Depending on the fuzzy object-oriented database platform, various implementation algorithms of these SDAI functions are developed.