String Generating Hypergraph Grammars with Word Order Restrictions

  • Martin Riedl
  • Sebastian Seifert
  • Ingrid Fischer
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4178)


Discontinuous constituents and free word order pose constant problems in natural language parsing. String generating hypergraph grammars have been proven useful for handling discontinuous constituents. In this paper we describe a new notation for hypergraph productions that allows on-the-fly interconnection of graph parts with regard to user-defined constraints. These constraints handle the order of nodes within the string hypergraph. The HyperEarley parser for string generating hypergraph grammars [1] is adapted to the new formalism. A German example is used for the explanation of the new notation and algorithms.


Noun Phrase Relative Clause Word Order Target Node Current Node 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Martin Riedl
    • 1
  • Sebastian Seifert
    • 1
  • Ingrid Fischer
    • 2
  1. 1.Computer Science InstituteUniversity of Erlangen–NurembergGermany
  2. 2.ALTANA Chair for Bioinformatics and Information MiningUniversity of KonstanzGermany

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