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DLog is an Description Logic ABox reasoner that uses resolution. The basic idea is that a DL knowledgebase is transformed into a Prolog program without any knowledge on the content of the ABox. The answers are obtained during normal Prolog execution.
A Prolog expert system supporting querying and extending the knowledgebase from a command-line interface using a format oriented on natural language, with the aim of being maintainable by the domain expert (i.e. without requiring programming skills).
PVN evaluates logical formula in a user defined n-valued semantics. Current efforts are aimed at fleshing out the port to GNU\'s prolog environment. Possible uses include embedding into a public domain knowledgebase for a defeasible reasoning system.
The Prolog Expert System Shell (PESS) is a software that generates ES using basically two components: KnowledgeBase, used by the ES to guide its decisions making, and Inference Machine, cable of collection the rules and generating new facts.