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Graph Topology Meets Energy-Driven Pathfinding: Preserving Contextual Consistency in Retrieval-Augmented Generation

Yufeng Li, Zaijing Li, F. Zhang, Zongzong Wu, Ming Zhao, Fengxiao Tang · 2026 · arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.29933 · cited by 0 works (OpenAlex) · open-access PDF

French

En revanche, leurs performances sont de plus en plus bloquées par les processus de structuration et de raisonnement des connaissances. (i) La perte sémantique sévère: la distillation de textes continus en symboles discrets éloigne les nuances contextuelles et la cohérence narrative. (ii) Les modalités définies sont de plus en plus bloquées par les processus de structuration et de raisonnement des connaissances. (i) La réécriture sémantique sévère: la distillation de textes continus en symboles discrets éloigne les nuances contextuelles et la cohérence narrative. Pour remédier à ces limitations, nous proposons ThreadRAG, un cadre de preuves RAG basé sur la topologie sémantique pour la structuration de

Machine translation (Meta M2M100); the English original follows.

Abstract

Retrieval-augmented generation (RAG) frequently integrates knowledge graphs (KGs) for complex multi-hop question answering. However, their performance is increasingly bottlenecked by the knowledge structuring and reasoning processes. (i) Severe semantic loss: Distilling continuous texts into discrete symbols strips away contextual nuances and narrative coherence. (ii) Pronounced modality mismatch: Fragmented graph structures clash with the continuous texts LLMs are pre-trained on, while rewriting them into natural language introduces generative noise and omits information. To address these limitations, we propose ThreadRAG, a semantic-topology-based RAG framework for context-preserving knowledge structuring and modality-native evidence reasoning. ThreadRAG introduces a Semantic Topology Mapper (STM), which organizes retrieved documents into context-intact Semantic Nodes and constructs a Semantic Topology Graph (STG) through narrative, semantic, and lexical edges. It further incorporates Energy-Driven Pathfinding (EDP), which identifies query-relevant subgraphs via energy diffusion and deterministically linearizes them into coherent textual evidence paths. Experiments on three multi-hop QA benchmarks demonstrate that ThreadRAG consistently outperforms strong baselines. Notably, it achieves a 14.4% EM improvement over text-centric methods on HotpotQA and surpasses the best baseline by 5.8% EM on 2WikiMultihop, while reducing token cost to 23.3% of the strongest baseline.

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Topics: Computer science, Theoretical computer science, Structuring, Graph, Security token, Consistency (knowledge bases)

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