tailieunhanh - Báo cáo khoa học: "Accumulation of Lexical Sets: Acquisition of Dictionary Resources and Production of New Lexical Sets"

This paper presents our work on accumulation o f lexical sets which includes acquisition o f dictionary resources and production o f new lexical sets from this. The method for the acquisition, using a context-free syntax-directed translator and text modification techniques, proves easy-to-use, flexible, and efficient. Categories of production are analyzed, and basic operations are proposed which make up a formalism for specifying and doing production. | Accumulation of Lexical Sets Acquisition of Dictionary Resources and Production of New Lexical Sets DOAN-NGUYEN Hai GETA - CLIPS - IMAG BP 53 38041 Grenoble France Fax 33 4 76 51 44 05 - Tel 33 4 76 63 59 76 - E-mail Abstract This paper presents our work on accumulation of lexical sets which includes acquisition of dictionary resources and production of new lexical sets from this. The method for the acquisition using a context-free syntax-directed translator and text modification techniques proves easy-to-use flexible and efficient. Categories of production are analyzed and basic operations are proposed which make up a formalism for specifying and doing production. About million lexical units were acquired and produced from dictionaries of various types and complexities. The paper also proposes a combinatorial and dynamic organization for lexical systems which is based on the notion of virtual accumulation and the abstraction levels of lexical sets. Keywords dictionary resources lexical acquisition lexical production lexical accumulation computational lexicography. Introduction Acquisition and exploitation of dictionary resources DRs machine-readable on-line dictionaries computational lexicons etc have long been recognized as important and difficult problems. Although there was a lot of work on DR acquisition such as Byrd al 1987 Neff Boguraev 1989 Blasi Koch 1992 etc it is still desirable to develop general powerful and easy-to-use methods and tools for this. Production of new dictionaries even only crude drafts from available ones has been much less treated and it seems that no general computational framework has been proposed see eg Byrd al 1987 Tanaka Umemura 1994 Dorr al 1995 . This paper deals with two problems acquiring textual DRs by converting them into structured forms and producing new lexical sets from those acquired. These two can be considered as two main activities of a more general notion the accumulation of lexical sets.