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Databases with Alternative Information
September 1991 (vol. 3 no. 3)
pp. 384-386

Alternative information is studied. Two different pieces of information, I1 AND/OR I2 and EITHER I1 OR I2 are examples of alternative information. Applicable models of data do not distinguish information of this kind, but such distinction, however, is important in many circumstances. An attempt to distinguish and process alternative information is made.

[1] E. F. Codd, "A relational model of data for large shared data banks,"Commun. ACM, pp. 377-387, June 1970.
[2] W. Homenda, Ph.D. dissertation, Warsaw, Poland, 1988.
[3] W. Marek and Z. Pawlak, "Information storage and retrieval systems--mathematical foundations,"Theoret. Comput. Sci., vol. 1, pp. 331-354, 1976.
[4] Z. Pawlak, "Mathematical foundations of information retrieval," CC PAS Rep., vol. 101, Warsaw, Poland, 1973.
[5] W. Lipski, "On semantic issues connected with incomplete information database," inProc. 3rd Int. Conf. Very Large Data Bases, Tokyo, Japan, 1977, pp. 6-8&71-83.
[6] W. Lipski, "On data bases with incomplete information,"J. ACM, vol. 28, pp. 41-70, 1981.

Index Terms:
alternative information; database management systems; information analysis
Citation:
W. Homenda, "Databases with Alternative Information," IEEE Transactions on Knowledge and Data Engineering, vol. 3, no. 3, pp. 384-386, Sept. 1991, doi:10.1109/69.91049
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