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benchmark dataset 1hierarchical augmentation 1metadata integration 1multi-document question answering 1retrieval-augmented generation 1

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most citedHiQA: A Hierarchical Contextual Augmentation RAG for Multi-Documents QA

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cs.CL2026★ 1 cited

HiQA: A Hierarchical Contextual Augmentation RAG for Multi-Documents QA

Xinyue Chen, Pengyu Gao, Jiangjiang Song +1

HiQA is a framework for multi‑document question answering that uses hierarchical contextual augmentation and a multi‑route retrieval mechanism with cascading metadata to improve re…