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This is a legal expert system for CISG as a present study result of the project on "Development of a Legal Expert System - Clarification of the Structure of Legal Knowledge and Realization of Legal Reasoning" (abbreviation: "Legal Expert"). This project is founded as the Grant-in-Aid for Scientific Research on Priority Areas by the Japanese Ministry of Education, Science and Culture (Monbusho). About 30 lawyers and computer scientists have been engaged in the interdisciplinary study of this project since May 1993 in Japan. This project includes the development of knowledge representation language, knowledge base of CISG (United Nations Conventions on Contracts for International Sale of Goods), several inference engines, and user interfaces such as knowledge constructing support tools and I/O system for natural language. The project goes on still further.
The ultimate goal of this research is to implement computerized expert systems, which are capable of performing human expert level legal inference. The implemented system executes deductive inference on a case with CISG (United Nations Convention on Contracts for the International Sale of Goods), in order to show its capability and to identify further research issues.
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