Enhancing Legal Document Retrieval: A Multi-Phase Approach with Large Language Models

• URL: http://arxiv.org/abs/2403.18093v1
• Date: Tue, 26 Mar 2024 20:25:53 GMT
• Title: Enhancing Legal Document Retrieval: A Multi-Phase Approach with Large Language Models
• Authors: Hai-Long Nguyen, Duc-Minh Nguyen, Tan-Minh Nguyen, Ha-Thanh Nguyen, Thi-Hai-Yen Vuong, Ken Satoh,
• Abstract summary: This research focuses on maximizing the potential of prompting by placing it as the final phase of the retrieval system. Experiments on the COLIEE 2023 dataset demonstrate that integrating prompting techniques on LLMs into the retrieval system significantly improves retrieval accuracy. However, error analysis reveals several existing issues in the retrieval system that still need resolution.
• Score: 7.299483088092052
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Large language models with billions of parameters, such as GPT-3.5, GPT-4, and LLaMA, are increasingly prevalent. Numerous studies have explored effective prompting techniques to harness the power of these LLMs for various research problems. Retrieval, specifically in the legal data domain, poses a challenging task for the direct application of Prompting techniques due to the large number and substantial length of legal articles. This research focuses on maximizing the potential of prompting by placing it as the final phase of the retrieval system, preceded by the support of two phases: BM25 Pre-ranking and BERT-based Re-ranking. Experiments on the COLIEE 2023 dataset demonstrate that integrating prompting techniques on LLMs into the retrieval system significantly improves retrieval accuracy. However, error analysis reveals several existing issues in the retrieval system that still need resolution.

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