DocumentCode :
1636174
Title :
A Fuzzy Temporal Model and Query Language for FTER Databases
Author :
Deng, Liguo ; Liang, Zhiheng ; Zhang, Yong
Author_Institution :
Sch. of Software, Shenyang Normal Univ., Shenyang
Volume :
3
fYear :
2008
Firstpage :
77
Lastpage :
82
Abstract :
In this paper, we propose a temporal extension to an extended ERT model and extend database temporal models to handle the fuzzy numbers. The concept of lifespan for entities and relationships is incorporated in the FTER model. We specify a fuzzy temporal query and update temporal language which is an extension from the TQuel language. The concepts of fuzzy temporal expressions, fuzzy temporal selection, fuzzy temporal join and fuzzy temporal projection are introduced, and their use in the query language is illustrated. We also discuss reducibility of the semantics to the language when applied to a static database and define the semantics of update operations.
Keywords :
fuzzy set theory; query languages; temporal databases; FTER databases; TQuel language; fuzzy numbers; fuzzy temporal query; query language; temporal language; Application software; Context modeling; Data models; Database languages; Deductive databases; Erbium; Fuzzy sets; Fuzzy systems; Intelligent systems; Uncertainty; ER model; fuzzy numbers; fuzzy temporal query; fuzzy temporal selection;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Intelligent Systems Design and Applications, 2008. ISDA '08. Eighth International Conference on
Conference_Location :
Kaohsiung
Print_ISBN :
978-0-7695-3382-7
Type :
conf
DOI :
10.1109/ISDA.2008.50
Filename :
4696441
Link To Document :
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