Deriving a Lexicon for a Precision Grammar from Language Documentation Resources: A Case Study of Chintang

نویسندگان

  • Emily M. Bender
  • Robert Schikowski
  • Balthasar Bickel
چکیده

Language documentation projects typically invest a lot of effort in creating digitized lexical resources, which are used in the creation of dictionaries and in the glossing of collected texts. We present and evaluate a methodology for repurposing such a lexical resource developed for Chintang (ISO639-3: ctn), a language of Nepal, for use with a precision implemented grammar developed in the DELPH-IN formalism. The target lexicon, when combined with a set of morphological rules, achieves 57% type-level coverage and 50% token-level coverage of held-out texts, while maintaining a feature-level accuracy F-measure of 70%. As lexicon development is typically one of the most expensive aspects of creating a precision grammar, this represents a significant savings of effort. TITLE AND ABSTRACT IN GERMAN Ableitung des Lexikons für eine Präzisionsgrammatik aus dokumentationslinguistischen Ressourcen anhand einer Fallstudie zum Chintang Typische Sprachdokumentationsprojekte investieren viel Zeit in den Aufbau digitaler lexikalischer Ressourcen, die für die Erstellung von Wörterbüchern und für die Glossierung von Korpustexten genutzt werden können. Dieser Vortrag stellt eine alternative Verwendung eines elektronischen Wörterbuchs vor, das für das Chintang (ISO639-3:ctn), eine bedrohte Sprache Nepals, entwickelt wurde. Die Kombination dieses Wörterbuchs mit einer nach dem DELPH-IN-Formalismus entwickelten Präzisionsgrammatik in Form morphologischer Regeln kann erste Texte auf der Type-Ebene zu 57% und auf der Token-Ebene zu 50% abdecken, wobei auf der Merkmalsebene ein F-Maß von 70% gewahrt wird. Da der Aufbau lexikalischer Ressourcen zu den zeitintensivsten Komponenten der Entwicklung einer Präzisionsgrammatik gehört, bringt diese Methode eine signifikante Zeitersparnis mit sich.

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تاریخ انتشار 2012