Datasets:
Update README.md
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README.md
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@@ -367,6 +367,31 @@ The dataset covers the 23 official languages of the European Union:
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Older documents may not include all 23 languages due to EU membership timelines, but more recent documents are consistently available in all languages.
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## Source and Licensing
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- *Source*: EUR-Lex – Access to European Union Law
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Older documents may not include all 23 languages due to EU membership timelines, but more recent documents are consistently available in all languages.
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### Citation Information
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```bibtex
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@inproceedings{ahmadi-etal-2026-lemur,
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title = "{LEMUR}: A Corpus for Robust Fine-Tuning of Multilingual Law Embedding Models for Retrieval",
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author = "Ahmadi, Narges Baba and
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Strich, Jan and
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Semmann, Martin and
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Biemann, Chris",
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editor = "Baez Santamaria, Selene and
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Somayajula, Sai Ashish and
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Yamaguchi, Atsuki",
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booktitle = "Proceedings of the 19th Conference of the {E}uropean Chapter of the {A}ssociation for {C}omputational {L}inguistics (Volume 4: Student Research Workshop)",
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month = mar,
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year = "2026",
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address = "Rabat, Morocco",
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publisher = "Association for Computational Linguistics",
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url = "https://aclanthology.org/2026.eacl-srw.18/",
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doi = "10.18653/v1/2026.eacl-srw.18",
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pages = "248--265",
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ISBN = "979-8-89176-383-8",
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abstract = "Large language models (LLMs) are increasingly used to access legal information. Yet, their deployment in multilingual legal settings is constrained by unreliable retrieval and the lack of domain-adapted, open-embedding models. In particular, existing multilingual legal corpora are not designed for semantic retrieval, and PDF-based legislative sources introduce substantial noise due to imperfect text extraction. To address these challenges, we introduce LEMUR, a large-scale multilingual corpus of EU environmental legislation constructed from 24,953 official EUR-Lex PDF documents covering 25 languages. We further propose the Lexical Content Score (LCS), a language-agnostic metric that quantifies the fidelity of PDF-to-text conversion by measuring lexical consistency against authoritative HTML versions. Building on LEMUR, we fine-tune three state-of-the-art multilingual embedding models using contrastive objectives in both monolingual and bilingual settings, reflecting realistic legal-retrieval scenarios. Experiments across low- and high-resource languages demonstrate that legal-domain fine-tuning consistently improves Top-k retrieval accuracy relative to strong baselines, with particularly pronounced gains for low-resource languages. Cross-lingual evaluations show that these improvements transfer to unseen languages, indicating that fine-tuning primarily enhances language-independent, content-level legal representations rather than language-specific cues. We publish code[GitHub Repository] and data[Hugging Face Dataset]."
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}
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```
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## Source and Licensing
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- *Source*: EUR-Lex – Access to European Union Law
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