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Transformer-Based Approaches for Legal Text Processing

Author

Listed:
  • Ha-Thanh Nguyen

    (Japan Advanced Institute of Science and Technology)

  • Minh-Phuong Nguyen

    (Japan Advanced Institute of Science and Technology)

  • Thi-Hai-Yen Vuong

    (University of Engineering and Technology, VNU)

  • Minh-Quan Bui

    (Japan Advanced Institute of Science and Technology)

  • Minh-Chau Nguyen

    (Japan Advanced Institute of Science and Technology)

  • Tran-Binh Dang

    (Japan Advanced Institute of Science and Technology)

  • Vu Tran

    (Institute of Statistical Mathematics)

  • Le-Minh Nguyen

    (Japan Advanced Institute of Science and Technology)

  • Ken Satoh

    (National Institute of Informatics)

Abstract

In this paper, we introduce our approaches using Transformer-based models for different problems of the COLIEE 2021 automatic legal text processing competition. Automated processing of legal documents is a challenging task because of the characteristics of legal documents as well as the limitation of the amount of data. With our detailed experiments, we found that Transformer-based pretrained language models can perform well with automated legal text-processing problems with appropriate approaches. We describe in detail the processing steps for each task such as problem formulation, data processing and augmentation, pretraining, finetuning. In addition, we introduce to the community two pretrained models that take advantage of parallel translations in legal domain, NFSP and NMSP. In which, NFSP achieves the state-of-the-art result in Task 5 of the competition. Although the paper focuses on technical reporting, the novelty of its approaches can also be an useful reference in automated legal document processing using Transformer-based models.

Suggested Citation

  • Ha-Thanh Nguyen & Minh-Phuong Nguyen & Thi-Hai-Yen Vuong & Minh-Quan Bui & Minh-Chau Nguyen & Tran-Binh Dang & Vu Tran & Le-Minh Nguyen & Ken Satoh, 2022. "Transformer-Based Approaches for Legal Text Processing," The Review of Socionetwork Strategies, Springer, vol. 16(1), pages 135-155, April.
    • Handle: RePEc:spr:trosos:v:16:y:2022:i:1:d:10.1007_s12626-022-00102-2
    DOI: 10.1007/s12626-022-00102-2
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