{"slug": "lexissue-benchmarking-legal-issue-identification-in-chinese-civil-litigation", "title": "LexIssue: Benchmarking Legal Issue Identification in Chinese Civil Litigation", "summary": "Researchers introduced LexIssue, a benchmark for legal issue identification in Chinese civil litigation, containing 430 real-world cases and 1,303 expert-annotated disputed legal issues, alongside a knowledge base spanning 27 causes of action and 441 candidate legal issue entries. The study found that retrieval-augmented generation using this knowledge base consistently improved model performance in identifying disputed legal issues and their legal attributes.", "body_md": "arXiv:2609.02954v1 Announce Type: new\nAbstract: Identifying the issues disputed between litigating parties is a crucial component of real-world litigation. However, legal issues remain comparatively underexplored in legal AI research. In this work, we study the computational modelling of legal issue identification in litigation. We introduce a legally grounded hierarchical schema that represents legal issues through both free-form issue descriptions and structured legal categories, and formulate legal issue identification as two complementary tasks: legal issue generation and legal issue classification. Based on this formulation, we construct LexIssue, a benchmark containing 430 real-world Chinese civil litigation cases and 1,303 expert-annotated disputed legal issues. We further develop an issue-centric legal knowledge base spanning 27 causes of action and 441 candidate legal issue entries to support retrieval-augmented reasoning. Experimental results across a diverse set of models show that retrieval-augmented generation using the constructed legal issue knowledge base consistently improves performance in identifying disputed legal issues and their corresponding legal attributes.", "url": "https://wpnews.pro/news/lexissue-benchmarking-legal-issue-identification-in-chinese-civil-litigation", "canonical_source": "https://arxiv.org/abs/2609.02954", "published_at": "2026-09-04 04:00:00+00:00", "updated_at": "2026-09-04 04:22:27.434930+00:00", "lang": "en", "topics": ["artificial-intelligence", "natural-language-processing", "ai-research"], "entities": ["LexIssue"], "alternates": {"html": "https://wpnews.pro/news/lexissue-benchmarking-legal-issue-identification-in-chinese-civil-litigation", "markdown": "https://wpnews.pro/news/lexissue-benchmarking-legal-issue-identification-in-chinese-civil-litigation.md", "text": "https://wpnews.pro/news/lexissue-benchmarking-legal-issue-identification-in-chinese-civil-litigation.txt", "jsonld": "https://wpnews.pro/news/lexissue-benchmarking-legal-issue-identification-in-chinese-civil-litigation.jsonld"}}