A computational representation for generalised phrase-structure grammars
University of Edinburgh, Dept. of Artificial Intelligence, 1987 - Computational linguistics - 24 pages
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2bar agreement features aliases allowed atomic categories in immediate-dominance categories matching complex categories computational implementation computational linguist COMPUTATIONAL REPRESENTATION conj context-free phrase-structure rules control agreement principle daughters dominance rule English ensures feature co-occurrence restrictions feature name feature specifications feature values feature-instantiation principles feature-specification defaults features plural foot-feature principle Gazdar GENERALISED PHRASE-STRUCTURE GRAMMARS Gerald Gazdar given in GPSG85 grammar-writer grammatical formalism head-feature convention input immediate-dominance rule instance instantiation principles language described lexical categories lexical entries linear-precedence rules list of feature natural language needed node notation noun phrase NP null NP VP NP-hard number of rules Obar parser parsing passive pform Phillips & Thompson plural 01 plural and person produce propagation rules REPRESENTATION FOR GENERALISED sentence similiar slash NP subcat in trans subcat trans subj Subject-auxiliary inversion syntactic trees trace categories types of rule unspecified verb phrase verbal versions of GPSG vform fin vform inf wide-coverage