Logic Programming '89 Proceedings of the 8th Conference, Tokyo, Japan, July 12-14, 1989

This volume contains selected papers presented at the Eighth Logic Programming Conference, held in Tokyo, 1989. Various topics in logic programming are covered. The first paper is an invited talk by Prof. Donald Michie, Chief Scientist of the Turing Institute, entitled "Human and Machine Learning of Descriptive Concepts", and introduces various research results on learning obtained by his group. There are eleven further papers, organized into sections on reasoning, logic programming language, concurrent programming, knowledge programming, natural language processing, and applications. A paper on knowledge programming introduces a flexible and powerful tool for incorporating and organizing knowledge using hypermedia. Another paper presents the constraint logic programming language cu-Prolog, designed for combinatorial problems; the way cu-Prolog solves the constraints is based on program transformation.

Human and machine learning of descriptive concepts.- The classification and boundary problem.- Semantics of non-monotonic reasoning based on perfect model.- Time-bounded reasoning in first order knowledge base systems.- Elementary formal system as a logic programming language.- Debugger for a parallel logic programing language Fleng.- Parallel generalized LR parser based on logic programming.- Knowledge media station.- cu-Prolog and its application to a JPSG parser.- Table-driven Bottom Up Parser in Prolog.- A consistency maintenance mechanism for subjective judgments and its application.- Logic design assistance using temporal logic based language Tokio.