(27) A Controlled Linguistic Model and its Application to Intelligent Natural Language Processing

A controlled linguistic model is a linguistic model which encodes linguistic characteristics specified by the domain. Such a model makes it easy to realize a powerful language processing system which is hard to realize on the generic domain. We concerns a set of legal sentences as such a domain. Legal sentences have lexical, syntactical, semantic, and contextual constraints. Based on the constraints, especially those on the requisite-effectuation structure which shows a logical skeleton structure of a law sentence, we actually designed a legal controlled linguistic model and then developed a parsing system. Even though they are still experimental systems, they can be applied to some practical use. There is a lot of skills both for designing a controlled linguistic model and for developing a parsing system. We accumulated such skills by this research project. By applying such skills, we also developed an environment system named as LIPS-Tools(Legal Information Processing System Tools). It is a GUI workbench for designing a controlled linguistic model and for managing variety of tasks on natural language processing. It provides flexible interface to parsing systems and other tools. Therefore, for example, you can use your own parsing systems suitable for your domain.