An alternative conception of tree-adjoining derivation

  • Authors:
  • Yves Schabes;Stuart M. Shieber

  • Affiliations:
  • Mitsubishi Electric Research Laboratory;Harvard University

  • Venue:
  • Computational Linguistics
  • Year:
  • 1994

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Abstract

The precise formulation of derivation for tree-adjoining grammars has important ramifications for a wide variety of uses of the formalism, from syntactic analysis to semantic interpretation and statistical language modeling. We argue that the definition of tree-adjoining derivation must be reformulated in order to manifest the proper linguistic dependencies in derivations. The particular proposal is both precisely characterizable through a definition of TAG derivations as equivalence classes of ordered derivation trees, and computationally operational, by virtue of a compilation to linear indexed grammars together with an efficient algorithm for recognition and parsing according to the compiled grammar.