Seminars

Our seminar series is free and available for anyone to attend. Unless otherwise stated, seminars take place on Wednesday afternoons at 2pm in the Kilburn Building during teaching season.

If you wish to propose a seminar speaker please contact Antoniu Pop.

 

Semantics for finite state approximations.

  • Speaker:   Professor  Stephen Pulman  (Somerville College, Oxford)
  • Host:   Ian Pratt-Hartmann
  • 9th November 2005 at 14:15 in 1.5
Abstract
Various methods for producing finite state approximations for context-free or richer grammatical formalisms have been proposed in recent years. These are of interest for various reasons: efficient parsing; compilation into tight language models for commercial speech recognisers, etc. However, the resulting approximations lose the syntactic information needed to provide a compositional semantics for the original grammars. This paper presents a set of semantic transforms to parallel the left-corner transforms described in Mark Johnson's 1998 paper (http://acl.ldc.upenn.edu/P/P98/P98-1101.pdf) which enable a compositional semantics expressed in a typed higher order logic to be propagated through from the original to the transformed grammar, meaning that logical forms can be recovered directly from the finite state approximation.
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