Development of Diachronic Terminology from Japanese Statutory Corpora

Authors

  • Makoto Nakamura Japan Legal Information Institute, Graduate School of Law, Nagoya University, Japan
  • Yasuhiro Ogawa Scholarly Information Division, Information Technology Center, Nagoya University Department of Systems and Social Informatics, Graduate School of Information Science, Nagoya University
  • Katsuhiko Toyama Scholarly Information Division, Information Technology Center, Nagoya University Department of Systems and Social Informatics, Graduate School of Information Science, Nagoya University

Abstract

This paper reports our ongoing research on the development of diachronic legal terminology, which deals with temporal changes in legal terms. We started by compiling statutory corpora for them. Focusing on articles that define legal terms, we defined a set of regular expression rules. Our experimental result showed that we successfully extracted legal terms, their explanations, and their relations. Our terminology consists of 26,661 terms and 35,201 relations, in which the precision of the relations was 88.0\% with 100 samples chosen at random. Graphical output will enrich our understanding of the dynamics of legal terms.

Author Biography

  • Makoto Nakamura, Japan Legal Information Institute, Graduate School of Law, Nagoya University, Japan

    Makoto Nakamura received the Bachelor degree in Information Engineering from Kyushu Institute of Technology in 1995. He received the Master and Doctoral degrees in Information Science from JAIST in 1997 and 2004, respectively. He is now a designated assistant professor at Japan Legal Information Institute, Graduate School of Law, Nagoya University, Japan. His research interests include Legal Text Processing, and Simulation of Language Evolution.

     

References

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Published

2016-03-01

Issue

Vol. 4 No. 1 (2016)

Section

Data organization and legal informatics

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