DS2-Instruct: Domain-Specific Data Synthesis for Large Language Models Instruction Tuning

Ruiyao Xu, Noelle I. Samia, Han Liu


Abstract
Adapting Large Language Models (LLMs) to specialized domains requires high-quality instruction tuning datasets, which are expensive to create through human annotation. Existing data synthesis methods focus on general-purpose tasks and fail to capture domain-specific terminology and reasoning patterns. To address this, we introduce DS2-Instruct, a zero-shot framework that generates domain-specific instruction datasets without human supervision. Our approach first generates task-informed keywords to ensure comprehensive domain coverage. It then creates diverse instructions by pairing these keywords with different cognitive levels from Bloom’s Taxonomy. Finally, it uses self-consistency validation to ensure data quality. We apply this framework to generate datasets across seven challenging domains, such as mathematics, finance, and logical reasoning. Comprehensive evaluation demonstrates that models fine-tuned on our generated data achieve substantial improvements over existing data generation methods.
Anthology ID:
2026.findings-eacl.176
Volume:
Findings of the Association for Computational Linguistics: EACL 2026
Month:
March
Year:
2026
Address:
Rabat, Morocco
Editors:
Vera Demberg, Kentaro Inui, Lluís Marquez
Venue:
Findings
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Publisher:
Association for Computational Linguistics
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Pages:
3368–3384
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URL:
https://preview.aclanthology.org/ingest-eacl/2026.findings-eacl.176/
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Cite (ACL):
Ruiyao Xu, Noelle I. Samia, and Han Liu. 2026. DS2-Instruct: Domain-Specific Data Synthesis for Large Language Models Instruction Tuning. In Findings of the Association for Computational Linguistics: EACL 2026, pages 3368–3384, Rabat, Morocco. Association for Computational Linguistics.
Cite (Informal):
DS2-Instruct: Domain-Specific Data Synthesis for Large Language Models Instruction Tuning (Xu et al., Findings 2026)
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