Topological dependency trees: a constraint-based account of linear precedence

  • Authors:
  • Denys Duchier;Ralph Debusmann

  • Affiliations:
  • Universität des Saarlandes, Saarbrücken, Germany;Universität des Saarlandes, Saarbrücken, Germany

  • Venue:
  • ACL '01 Proceedings of the 39th Annual Meeting on Association for Computational Linguistics
  • Year:
  • 2001

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Abstract

We describe a new framework for dependency grammar, with a modular decomposition of immediate dependency and linear precedence. Our approach distinguishes two orthogonal yet mutually constraining structures: a syntactic dependency tree and a topological dependency tree. The syntax tree is nonprojective and even non-ordered, while the topological tree is projective and partially ordered.