Abstract
The system of relational factbases is introduced as the natural extension of A that allows to represent explicit negative information. In order to justify the choice of partial logic with weak and strong negation, we first show that when admitting negative information while retaining classical logic as the basis for query answering, one obtains a system, called birelational databases,that has a number of severe shortcomings. Only by using weak and strong negation on the basis of partial logic, the problems with birelational databases can be overcome.
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© 1998 Springer Science+Business Media New York
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Wagner, G. (1998). Relational Factbases. In: Foundations of Knowledge Systems. The Kluwer International Series on Advances in Database Systems, vol 13. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-5723-4_11
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DOI: https://doi.org/10.1007/978-1-4615-5723-4_11
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-7621-7
Online ISBN: 978-1-4615-5723-4
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