tailieunhanh - Báo cáo khoa học: "Experiments in Reusability of Grammatical Resources"

Substantial formal grammatical and lexical resources exist in various NLP systems and in the form of textbook specifications. In the present paper we report on experimental results obtained in manual, semi-antomatic and automatic migration of entire computational or textbook descriptions (as opposed to a more informal reuse of ideas or the design of a single "polytheoretic" representation) from a variety of formalisms into the ALEP formalism. 1 The choice of ALEP (a comparatively lean, typed feature structure formalism based on rewrite rules) was motivated by the assumption that the study would be most interesting if the target formalism is. | Experiments in Reusability of Grammatical Resources Doug Arnold0 Toni Badia Josef van Genabith0 Stella Markantonatou0 Stefan Momma0 Louisa Sadler0 Paul Schmidt0 Dept of Language and Linguistics University of Essex Colchester C04 3SQ UK Universitat Pompeu Fabra La Ramba 32 08002 Barcelona Spain IMS-CL AzenbergstraBe 12 University of Stuttgart D-W7000 Stuttgart Germany IAI Martin-Luther-StraBe 14 D-W6600 Saarbrũcken 3 Germany doug marks louisa@ tbadia@ steff j osef@ims. uni-Stuttgart. de paul@iai. uni-sb. de Abstract Substantial formal grammatical and lexical resources exist in various NLP systems and in the form of textbook specifications. In the present paper we report on experimental results obtained in manual semi-automatic and automatic migration of entire computational or textbook descriptions as opposed to a more informal reuse of ideas or the design of a single poly-theoretic representation from a variety of formalisms into the ALEP The choice of ALEP a comparatively lean typed feature structure formalism based on rewrite rules was motivated by the assumption that the study would be most interesting if the target formalism is relatively mainstream without overt ideological commitments to particular grammatical theories. As regards the source formalisms we have attempted migrations of descriptions in HPSG which uses fully-typed feature structures and has a strong non-derivational flavour ETS an untyped stratificational formalism which essentially uses rewrite rules for feature structures and has run-time non-monotonic devices and LFG which is an un-typed constraint and CF-PSG based formalism with extensions such as existential negative and global well-formedness constraints . The work reported in this paper was supported by the CEC as part of the project ET10 52. 1 Introduction Reusability of grammatical resources is an important idea. Practically it has obvious economic benefits in allowing grammars to be developed cheaply for .

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