Abstract
Prolog-ELF incorporating fuzzy logic and several useful functions into Prolog has been implemented as a basic language for building knowledge systems with uncertainty or fuzziness. Prolog-ELF inherits all the desirable basic features of Prolog. In addition to assertions with truth-values between 1.0 and 0.5 (0 for exceptional cases), fuzzy sets can be very easily manipulated. An application of fuzzy logical database is illustrated.
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Ishizuka, M., Kanai, N. Prolog-ELF incorporating fuzzy logic. NGCO 3, 479–486 (1985). https://doi.org/10.1007/BF03037082
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DOI: https://doi.org/10.1007/BF03037082