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Large Language Models (LLMs) excel at reasoning but benefit from grounding provided by Knowledge Graphs (KGs). However, integrating these paradigms is challenging. We introduce GraLan, which enables KGs to “speak;; directly in the LLM’s semantic space through relational tokens that preserve graph structure. GraLan’s trainable language mediator generates structured tokens for any frozen LLM, creating a foundation for knowledge-intensive applications. We demonstrate its effectiveness in question-answering by re-framing the task as entity classification over question-focused subgraphs. Experiments show that GraLan significantly outperforms existing methods, particularly on complex multi-hop reasoning tasks, establishing a new paradigm for KG-LLM integration that maintains structural fidelity while leveraging LLMs’ reasoning capabilities.

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The Graph Language: How Knowledge Graphs Speak to Large Language Models

  • 会议论文

  • 发表日期：

    2026年

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  • Giuseppe Pirrò

摘要

Large Language Models (LLMs) excel at reasoning but benefit from grounding provided by Knowledge Graphs (KGs). However, integrating these paradigms is challenging. We introduce GraLan, which enables KGs to “speak;; directly in the LLM’s semantic space through relational tokens that preserve graph structure. GraLan’s trainable language mediator generates structured tokens for any frozen LLM, creating a foundation for knowledge-intensive applications. We demonstrate its effectiveness in question-answering by re-framing the task as entity classification over question-focused subgraphs. Experiments show that GraLan significantly outperforms existing methods, particularly on complex multi-hop reasoning tasks, establishing a new paradigm for KG-LLM integration that maintains structural fidelity while leveraging LLMs’ reasoning capabilities.