Treatment of imprecision in data repositories with the aid of KNOLAP

Rogova, E. 2010. Treatment of imprecision in data repositories with the aid of KNOLAP. PhD thesis University of Westminster School of Electronics and Computer Science

TitleTreatment of imprecision in data repositories with the aid of KNOLAP
TypePhD thesis
AuthorsRogova, E.
Abstract

Traditional data repositories introduced for the needs of business

processing, typically focus on the storage and querying of crisp

domains of data. As a result, current commercial data repositories

have no facilities for either storing or querying imprecise/

approximate data.

No significant attempt has been made for a generic and applicationindependent

representation of value imprecision mainly as a

property of axes of analysis and also as part of dynamic

environment, where potential users may wish to define their “own”

axes of analysis for querying either precise or imprecise facts. In

such cases, measured values and facts are characterised by

descriptive values drawn from a number of dimensions, whereas

values of a dimension are organised as hierarchical levels.

A solution named H-IFS is presented that allows the representation

of flexible hierarchies as part of the dimension structures. An

extended multidimensional model named IF-Cube is put forward,

which allows the representation of imprecision in facts and

dimensions and answering of queries based on imprecise

hierarchical preferences. Based on the H-IFS and IF-Cube

concepts, a post relational OLAP environment is delivered, the

implementation of which is DBMS independent and its performance

solely dependent on the underlying DBMS engine.

Year2010
FileRogova.pdf
Publication dates
Completed2010

Related outputs

The notion of H-IFS: an approach for enhancing the OLAP capabilities in oracle10g
Chountas, P., Rogova, E. and Atanassov, K.T. 2011. The notion of H-IFS: an approach for enhancing the OLAP capabilities in oracle10g. International Journal of Intelligent Systems. 26 (3), pp. 262-283.

Expressing hierarchical preferences in OLAP queries
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The notion of H-IFS -an approach for enhancing query capabilities in Oracle10g
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Flexible hierarchies and fuzzy knowledge-based OLAP
Rogova, E., Chountas, P. and Atanassov, K.T. 2007. Flexible hierarchies and fuzzy knowledge-based OLAP. in: Proc. of Fourth International Conference on Fuzzy Systems and Knowledge Discovery, 2007. FSKD 2007. IEEE . pp. 7-11

On imprecision intuitionistic fuzzy sets & OLAP - the case for KNOLAP
Rogova, E. and Chountas, P. 2007. On imprecision intuitionistic fuzzy sets & OLAP - the case for KNOLAP. in: Castillo, O., Patricia Melin, B., Pedryczev, W. and Kacprzyk, J. (ed.) Theoretical Advances and Applications of Fuzzy Logic and Soft Computing Berlin and Heidelberg GmbH & Co. KG Springer. pp. 11-22

Permalink - https://westminsterresearch.westminster.ac.uk/item/907q7/treatment-of-imprecision-in-data-repositories-with-the-aid-of-knolap


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