Some Remarks on Extensions and Restrictions of Information Systems

  • Authors:
  • Zbigniew Suraj

  • Affiliations:
  • -

  • Venue:
  • RSCTC '00 Revised Papers from the Second International Conference on Rough Sets and Current Trends in Computing
  • Year:
  • 2000

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Abstract

Information systems (data tables) are often used to represent experimental data [4],[5],[8]. In [16] it has been pointed out that notions of extension and restriction of information system are crucial for solving different class of problems [6],[7],[10]-[11],[12]-[15]. The intent of this paper is to present some properties of an information system extension (restriction) and methods of their verification.