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Chart Parsing in Prolog Lexical Functional Grammar constraints and concurrent constraint programming Phrase Structure in a Computational Model of Child Language Acquisition Representation, Coherence and Inference
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AI and Cognitive Science 1994

Hancox, P. The uniform treatment of constraints, coherency and completeness in a Lexical Functional Grammar compiler. In: AI and Cognitive Science '94: proceedings of the 7th Annual Conference, Trinity College, Dublin, 8-9 September 1994. Dublin: Trinity College, 1994. pp 129-142.

 

Abstract

Lexical Functional Grammar (LFG) describes linguistic structure in terms of a Functional structure (F-structure) that may be computed by the evaluation of equations written in the grammar and lexicon. Constraints can be placed on F-structure features to restrict the instantiation or non-instantiation of features and ranges of possible values assigned to features. F-structures must have qualities of coherency and completeness so as to be well-formed. An LFG compiler is briefly described and it is shown how constraints may be compiled so as to improve post-parse checking speed. Coherency and completeness are shown to be re-interpretable as constraints checks in their own right (although this is not explicit in LFG) and thus they may be treated in a way uniform with LFG's own constraints.

 

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