Updates in a knowledge base, given as an information system in rough set theory, may need to be made due to changes in (i) the set of attributes, (ii) attribute-values, or (iii) the set of objects (instances). In this article, we propose a logic for information systems which incorporates all these three aspects of updates. The logic can capture the flow of information as well as its effects on the approximations of concepts. A sound and complete deductive system for the logic is presented. The decidability issue is also discussed. © 2013 Elsevier Inc. All rights reserved.
Khan, M. A., Banerjee, M., & Rieke, R. (2014). An update logic for information systems. International Journal of Approximate Reasoning, 55(1 PART 4), 436–456. https://doi.org/10.1016/j.ijar.2013.07.007