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KG-Retriever: Efficient Knowledge Indexing for Retrieval-Augmented Large Language Models

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arxiv 2412.05547 v2 pith:YF7QKDBG submitted 2024-12-07 cs.IR cs.AI

classification cs.IRcs.AI
keywords knowledgegraphinformationkg-retrieverretrievalchallengecollaborativedocuments
verification ladder T0 review T1 audit T2 compute T3 formal
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Large language models with retrieval-augmented generation encounter a pivotal challenge in intricate retrieval tasks, e.g., multi-hop question answering, which requires the model to navigate across multiple documents and generate comprehensive responses based on fragmented information. To tackle this challenge, we introduce a novel Knowledge Graph-based RAG framework with a hierarchical knowledge retriever, termed KG-Retriever. The retrieval indexing in KG-Retriever is constructed on a hierarchical index graph that consists of a knowledge graph layer and a collaborative document layer. The associative nature of graph structures is fully utilized to strengthen intra-document and inter-document connectivity, thereby fundamentally alleviating the information fragmentation problem and meanwhile improving the retrieval efficiency in cross-document retrieval of LLMs. With the coarse-grained collaborative information from neighboring documents and concise information from the knowledge graph, KG-Retriever achieves marked improvements on five public QA datasets, showing the effectiveness and efficiency of our proposed RAG framework.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. LogosKG: Hardware-Optimized Scalable and Interpretable Knowledge Graph Retrieval

    cs.CL 2026-04 unverdicted novelty 6.0 of 10

    LogosKG delivers a novel hardware-aligned system for efficient multi-hop retrieval on billion-edge knowledge graphs without sacrificing fidelity, demonstrated via biomedical KG-LLM applications.

  2. GOSU: Retrieval-Augmented Generation with Global-Level Optimized Semantic Unit-Centric Framework

    cs.CL 2025-08 reject novelty 5.0 of 10

    GOSU globally merges semantic units from text chunks into a unit-centric knowledge graph and uses three-tier keyword retrieval to improve RAG generation quality, according to LLM-judge win rates.

  3. Entropy-Constrained Strategy Optimization in Urban Floods: A Multi-Agent Framework with LLM and Knowledge Graph Integration

    cs.AI 2025-08 reject novelty 5.0 of 10

    H-J, a hierarchical LLM multi-agent framework with knowledge retrieval, entropy constraints, and closed-loop feedback, outperforms rule-based and PPO baselines in simulated urban flood dispatch across three rainfall s...

  4. LLMs+Graphs: Toward Graph-Native, Synergistic AI Systems

    cs.DB 2026-06 unverdicted novelty 2.0 of 10

    The paper synthesizes three synergies between LLMs and graphs—augmented retrieval/reasoning, bidirectional KG integration, and graph-enhanced agents—plus LLM uses in graph data management and ML.

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