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On the criteria to be used in decomposing systems into modules
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PReMI'07 Proceedings of the 2nd international conference on Pattern recognition and machine intelligence
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RSKT'11 Proceedings of the 6th international conference on Rough sets and knowledge technology
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Design automation tools for efficient implementation of logic functions by decomposition
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
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Fundamenta Informaticae - Concurrency Specification and Programming (CS&P 2003)
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Fundamenta Informaticae
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The aim of this paper is to present the methods and algorithms of information systems decomposition. In the paper, decomposition with respect to reducts and the so-called global decomposition are considered. Moreover, coverings of information systems by components are discussed. An essential difference between two kinds of decomposition can be observed. In general, global decomposition can deliver more components of a given information system. This fact can be treated as some kind of additional knowledge about the system. The proposed approach is based on rough set theory. To demonstrate the usefulness of this approach, we present an illustrative example coming from the economy domain. The discussed decomposition methods can be applied e.g. for design and analysis of concurrent systems specified by information systems, for automatic feature extraction, as well as for control design of systems represented by experimental data tables.