XML Modeling of Fuzzy Data with Relational Databases

Information imprecision and uncertainty exist in many real-world applications and for this reason fuzzy data modeling has been extensively investigated in various data models.Currently,huge amounts of electronic data are available on the Internet,and XML has been the de-facto standard of information representation and exchange over the Web.Current efforts fall short in their ability to satisfy the requirement of intelligent management over XML data.Therefore,beginning with an investigation of data modeling,the authors identify multiple granularity of data fuzziness in XML and fuzzy XML data model based on the theory of fuzzy set and possibility distributions.The authors further investigate the formal conversions from the fuzzy relational databases to the fuzzy XML model,which is established by introducing a series of mapping rules,and demonstrate the validity of the proposed approach by using a practical case.The conversions from the fuzzy relational databases to the fuzzy XML model lay a theoretical foundation for establishing the overall management system of fuzzy XML data.