TAILIEUCHUNG - Báo cáo khoa học: "PARAHETRIZED FOR LINGUISTIC ABSTRACT FORMATION OBJECTS PROCESSING"

Our w o r k on the p r o c e s s i n ~ of a special kind of linguistic information, namely temporal information ,has led us to advocate the use of can lead to some pointless discussions between different approaches which, at an abstract level, can be s h o w n to be equivalent; secondly, any e x t e n s i o n or modification of the implemented model requires a different program instead of a m e r e a d j u s t m e n t at. | PARAMETRIZED ABSTRACT OBJECTS FOR LINGUISTIC INFORMATION PROCESSING Helene Bestougeff Gerard Ligozat CNRS-Universite Paris VII 2 Place Jussieu 75005 PARIS FRANCE ABSTRACT Programming languages which have adequate primitives for linguistic information processing and a clear semantics at the formal computational level are now slowly emerging as a convergent effort from computer science linguistics and artificial intelligence. Our work on the processing of a special kind of linguistic information namely temporal information .has led US to advocate the use of a language with the following characteristic features - high level of abstraction - capacity for inference - modularity. A high level of abstraction is needed to deal with complex linguistic notions which are not easily reducible to elementary data structures. A capacity for Inference is required as most criteria or tests in linguistics make use of particular kinds of deductions at different levels of the linguistic analysis. As for modularity a typical situation in linguistics has to do with a hierarchy of concepts or units and the relations between those units at different levels. This paper discusses the relevance of the choice of parametrized abstract objects as tools for linguistic information processing and exemplifies the use of such objects for temporal information. INTRODUCTION In computational linguistics more than often there is a tendency to directly Implement a model without really going through a specification step which would provide a correct abstraction of the implementation. This attitude has at least two drawbacks Firstly there is no formal way of comparing two models this can lead to some pointless discussions between different approaches which at an abstract level can be shown to be equivalent secondly any extension or modification of the Implemented model requires a different program Instead of a mere adjustment at the abstract level which should facilitate the modular updating of the .

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