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The Head-driven phrase structure grammar (HPSG) is a non-derivational generative grammar theory developed by Carl Pollard and Ivan Sag ( 1985). It is the immediate successor to Generalised Phrase Structure Grammar. HPSG draws from other fields such as computer science (data type theory and knowledge representation) and uses the notion of sign ( Ferdinand de Saussure). It uses a uniform formalism and is organized in a modular way which makes it attractive for natural language processing.

A HPSG grammar includes principles and grammar rules and lexicon entries which are normally not considered to belong to a grammar.

The basic type HPSG deals with is the sign. It has two features: PHON (the sound, the phonetic form) and SYNSEM (the syntactic and semantic information), both of which are split into subfeatures. Signs are formalised as typed feature structures.

1 See also

Generalised phrase structure grammar
Lexical functional grammar
syntax
Transformational grammarTransformational grammar is a broad term describing grammars (almost exclusively those of natural languages) which have been developed in a Chomskyan tradition. The term is usually synonymous with the slightly more specific transformational-generative gra

2 Books

Carl Pollard, Ivan A. Sag (1987): Information-based Syntax and Semantics. Volume 1: Fundamentals. Stanford: University of Chicago Press.
Carl Pollard, Ivan A. Sag (1994): Head-Driven Phrase Structure Grammar. Chicago: University of Chicago Press. ([1])
Ivan A. Sag, Thomas Wasow , Emily Bender (2003): Syntactic Theory: a formal introduction, Second Edition. Chicago: University of Chicago Press. ([2])

3 External links

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