Extraction of Legal Definitions and Their Explanations with Accessible Citations

  • Makoto Nakamura
  • Yasuhiro Ogawa
  • Katsuhiko Toyama
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8929)


The aim of this paper is to produce a Japanese legal terminology consisting of legal terms and their explanations that includes accessible citations. Although we have succeeded in finding over 14,000 terms with high precision, 23.1 percent of the correct explanations included citations that were inaccessible due to context-dependent format. We propose a method for revising explanatory sentences that takes into account XML-tag annotation for context-independent format for all citations. The effectiveness of this method is confirmed by our experimental results.


Japanese statutes Definitions XML Citations 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Makoto Nakamura
    • 1
  • Yasuhiro Ogawa
    • 2
    • 3
  • Katsuhiko Toyama
    • 2
    • 3
  1. 1.Japan Legal Information Institute, Graduate School of LawNagoya UniversityNagoyaJapan
  2. 2.Information Technology CenterNagoya UniversityNagoyaJapan
  3. 3.Graduate School of Information ScienceNagoya UniversityNagoyaJapan

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