Authors:
N. Marín
1
;
J. M. Medina
1
;
O. Pons
1
and
M. C. Garrido
2
Affiliations:
1
University of Granada, Spain
;
2
Junta de Andaluca, Spain
Keyword(s):
Fuzzy Data, Temporal Database, Fuzzy Interval, Data Manipulation.
Related
Ontology
Subjects/Areas/Topics:
Applications
;
Data Engineering
;
Enterprise Information Systems
;
Information Retrieval
;
Information Systems Analysis and Specification
;
Management Information Systems
;
Ontologies and the Semantic Web
;
Pattern Recognition
;
Software Engineering
Abstract:
Temporal Databases (TDB) have as a primary aim to offer a common framework to those DB applications that need to store or handle temporal data of different nature or source, since they allow to unify the concept of time from the point of view of its meaning, its representation and its manipulation. Up to now, most of the efforts have been devoted to extend the relational model in order to be adapted to the new way of inserting, deleting and updating the DB, together with the integrity constraints involved. In this paper we deal with these problems when the time is imprecisely expressed by means of a fuzzy interval of dates. Along the text, we will see how the delete and the insert operations can be carried out and how different types of queries to such a fuzzy temporal database are solved.