tailieunhanh - Báo cáo khoa học: "A GENERAL TRANSDUCER FOR TEACHING"

The GTI~syst~m is a tree-to-tree transducer developed for teaching purposes in machine translation. The transducer is a specialized production system giving the linguists the tools for expressing infon~ation in a syntax that is close to theoretical linguistics. Major emphasis was placed on developing a system that is user friendly, uniform and legible. This paper describes the linguistic data structure, the rule formalism and the control facilities that the linguist is provided with. | GTT A GENERAL TRANSDUCER FOR TEACHING COMPUTATIONAL LINGUISTICS p. Shann . Cochard Dalle Molle Institute for Semantic and Cognitive Studies University of Geneva Switzerland ABSTRACT The GTT-system is a tree-to-tree transducer developed for teaching purposes in machine translation. The transducer is a specialized production system giving the linguists the tools for expressing information in a syntax that is close to theoretical linguistics. Major emphasis was placed on developing a system that is user friendly uniform and legible. This paper describes the linguistic data structure the rule formalism and the control facilities that the linguist is provided with. 1. INTRODUCTION The GIT-system Geneva Teaching Transducer 1 is a general tree-to-tree transducer developed as a tool for training linguists in machine translation and computational linguistics. The transducer is a specialized production system tailored to the requirements of corputational linguists providing them with a means of expressing information in a format close to the linguistic theory they are familiar with. GTT has been developed for teaching purposes and cannot be considered as a system for large scale development. A first version has been implemented in standard Pascal and is currently running on a Univac 1100 61 and a VAX-780 under UNIX. At present it is being used by a team of linguists for experimental development of an w system for a special purpose language Buchmann et al. 1984 and to train students in computational linguistics. 2. THE UNIFOraCTY AND SIMPLICITY OF THE SYSTEM As a tool for training computational linguists major emphasis was placed on developing a system that is user friendly uniform and which provides a legible syntax. One of the important requirements in machine translation is the separation of linguistic data and algorithms Vauquois 1975 . The linguist should have the means to express his knowledge declaratively without being obliged to mix ccmpu- This project is .