Knowledge representation (Information theory) 12 Artificial intelligence 4 LISP (Computer program language) 4 Problem solving 4 Prolog (Computer program language) 4 Information organization 2 Information retrieval 2 Ontologies (Information retrieval) 2 Reasoning 2 Artificial intelligence - Mathematics 1 Conceptual structures (Information theory) 1 Congresses 1 Expert systems (Computer science) 1 Information organization and retrieval 1 Information science 1 Information storage and retrieval systems 1 Knowledge representation - Information theory 1 Ontologies - Information retrieval 1 Semantic networks (Information theory) 1 Semantic networks - Information theory 1 Software engineering 1