Top-down k-best A* parsing

  • Authors:
  • Adam Pauls;Dan Klein;Chris Quirk

  • Affiliations:
  • University of California at Berkeley;University of California at Berkeley;Microsoft Research, Redmond, WA

  • Venue:
  • ACLShort '10 Proceedings of the ACL 2010 Conference Short Papers
  • Year:
  • 2010

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Abstract

We propose a top-down algorithm for extracting k-best lists from a parser. Our algorithm, TKA* is a variant of the k-best A* (KA*) algorithm of Pauls and Klein (2009). In contrast to KA*, which performs an inside and outside pass before performing k-best extraction bottom up, TKA* performs only the inside pass before extracting k-best lists top down. TKA* maintains the same optimality and efficiency guarantees of KA*, but is simpler to both specify and implement.