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Uncertainty in a nested relational database model
Date
1999-07-01
Author
Yazıcı, Adnan
Soysal, A
Buckles, BP
Petry, FE
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Some database models have already been developed to deal with complex values but they have constrains that data stored is precise and queries are crisp. However, as many researchers have pointed out, there is a need to present, manipulate, and query complex and uncertain data of various non-traditional database applications such as oceanography, multimedia, meteorology, office automation systems, engineering designs, expert database systems and geographic information systems. In this paper, we present a logical database model, which is an extension of a nested relational data model (also known as an NF2 data model), for representing and manipulating complex and uncertain data in databases. We also introduce a possible physical representation of such complex and uncertain values in databases and describe the query processing of the model that we discuss here.
Subject Keywords
Complex values
,
Physical representation
,
Query processing
,
Extended NF2 data model
,
Uncertainty
URI
https://hdl.handle.net/11511/62867
Journal
DATA & KNOWLEDGE ENGINEERING
DOI
https://doi.org/10.1016/s0169-023x(99)00010-5
Collections
Department of Computer Engineering, Article