The semantic web is supposed to become a characteristic phenomenon of the worldwide web in the next decade. One of the basic semantic web tools is the XML language. The aim of this paper is to provide information on how web documents written in the XML language can be rewritten into logic forms expressed as Prolog/Datalog programs. The XML language… (More)
We describe the application of the magic sets method for efficient query evaluation of fuzzy logic programs. The logic programs considered are written in Datalog language and are processed by the deductive database system developed at the Deductive system enriched with fuzzy logic is able to better serve as a knowledge system. Speeding up its execution… (More)
This paper describes a method of the efficient query evaluation when uncertainty is involved in a deductive database system. A deductive system enriched with fuzzy logic is able to serve better as a knowledge system. Speeding up its execution makes this system practically useful.