Conceptual structures: information processing in mind and machine
Conceptual structures: information processing in mind and machine
Query generalization: a method for interpreting null answers
Proceedings from the first international workshop on Expert database systems
Retrieval of multimedia documents by imprecise query specification
EDBT '90 Proceedings of the 2nd international conference on extending database technology: Advances in Database Technology
Connectives and quantifiers in fuzzy sets
Fuzzy Sets and Systems - Special memorial volume on foundations of fuzzy reasoning
Mediation in information systems
ACM Computing Surveys (CSUR)
Research problems in data warehousing
CIKM '95 Proceedings of the fourth international conference on Information and knowledge management
AAAI '98/IAAI '98 Proceedings of the fifteenth national/tenth conference on Artificial intelligence/Innovative applications of artificial intelligence
On Databases with Incomplete Information
Journal of the ACM (JACM)
Fundamentals of Data Warehouses
Fundamentals of Data Warehouses
A Server for Fuzzy SQL Queries
FQAS '98 Proceedings of the Third International Conference on Flexible Query Answering Systems
ICCS '93 Proceedings on Conceptual Graphs for Knowledge Representation
Information Integration: The MOMIS Project Demonstration
VLDB '00 Proceedings of the 26th International Conference on Very Large Data Bases
Xyleme: A Dynamic Warehouse for XML Data of the Web
IDEAS '01 Proceedings of the International Database Engineering & Applications Symposium
Soft Querying, a New Feature for Database Management Systems
DEXA '94 Proceedings of the 5th International Conference on Database and Expert Systems Applications
Implementing Fuzzy Querying via the Internet/WWW: Java Applets, ActiveX Controls and Cookies
FQAS '98 Proceedings of the Third International Conference on Flexible Query Answering Systems
On Representation-Based Querying of Databases Containing Ill-known Values
ISMIS '97 Proceedings of the 10th International Symposium on Foundations of Intelligent Systems
Fuzzy semantic tagging and flexible querying of XML documents extracted from the Web
Journal of Intelligent Information Systems
IEEE Transactions on Fuzzy Systems
SQLf: a relational database language for fuzzy querying
IEEE Transactions on Fuzzy Systems
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This paper is dedicated to the use of fuzzy concepts in the design of a database in the field of predictive microbiology. Three characteristics of the data have guided this design: heterogeneity, incompleteness and imprecision. Three data models have been used to represent the data: the relational model, the conceptual graph model and the XML model. These models have been extended to be able to represent imprecise data as possibility distributions. They are queried simultaneously using the MIEL language. In this language, the preferences of the user are represented by fuzzy sets. Fuzzy pattern matching techniques are used to compare preferences to imprecise data. Fuzzy sets may be defined on a hierarchized domain of values, called a taxonomy (values of the domain are connected using the a kind of semantic link). The semantics of such a fuzzy set is precisely defined. The notion of fuzzy set closure is introduced to compare two fuzzy sets whose domain of values is a taxonomy.