Turkish Language Resources: Morphological Parser, Morphological Disambiguator and Web Corpus

  • Authors:
  • Haşim Sak;Tunga Güngör;Murat Saraçlar

  • Affiliations:
  • Computer Engineering Department, Boğaziçi University, Bebek, Turkey 34342;Computer Engineering Department, Boğaziçi University, Bebek, Turkey 34342;Electrical and Electronic Engineering Department, Boğaziçi University, Bebek, Turkey 34342

  • Venue:
  • GoTAL '08 Proceedings of the 6th international conference on Advances in Natural Language Processing
  • Year:
  • 2008

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Abstract

In this paper, we propose a set of language resources for building Turkish language processing applications. Specifically, we present a finite-state implementation of a morphological parser, an averaged perceptron-based morphological disambiguator, and compilation of a web corpus. Turkish is an agglutinative language with a highly productive inflectional and derivational morphology. We present an implementation of a morphological parser based on two-level morphology. This parser is one of the most complete parsers for Turkish and it runs independent of any other external system such as PC-KIMMO in contrast to existing parsers. Due to complex phonology and morphology of Turkish, parsing introduces some ambiguous parses. We developed a morphological disambiguator with accuracy of about 98% using averaged perceptron algorithm. We also present our efforts to build a Turkish web corpus of about 423 million words.