LLM Inference Enhanced by External Knowledge: A Survey

Fuente: arXiv
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Autores principales: Lin, Yu-Hsuan, Chen, Qian-Hui, Cheng, Yi-Jie, Zhang, Jia-Ren, Liu, Yi-Hung, Hsia, Liang-Yu, Chen, Yun-Nung
Formato: Preprint
Publicado: 2025
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author Lin, Yu-Hsuan
Chen, Qian-Hui
Cheng, Yi-Jie
Zhang, Jia-Ren
Liu, Yi-Hung
Hsia, Liang-Yu
Chen, Yun-Nung
author_facet Lin, Yu-Hsuan
Chen, Qian-Hui
Cheng, Yi-Jie
Zhang, Jia-Ren
Liu, Yi-Hung
Hsia, Liang-Yu
Chen, Yun-Nung
contents Recent advancements in large language models (LLMs) have enhanced natural-language reasoning. However, their limited parametric memory and susceptibility to hallucination present persistent challenges for tasks requiring accurate, context-based inference. To overcome these limitations, an increasing number of studies have proposed leveraging external knowledge to enhance LLMs. This study offers a systematic exploration of strategies for using external knowledge to enhance LLMs, beginning with a taxonomy that categorizes external knowledge into unstructured and structured data. We then focus on structured knowledge, presenting distinct taxonomies for tables and knowledge graphs (KGs), detailing their integration paradigms with LLMs, and reviewing representative methods. Our comparative analysis further highlights the trade-offs among interpretability, scalability, and performance, providing insights for developing trustworthy and generalizable knowledge-enhanced LLMs.
format Preprint
id arxiv_https___arxiv_org_abs_2505_24377
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle LLM Inference Enhanced by External Knowledge: A Survey
Lin, Yu-Hsuan
Chen, Qian-Hui
Cheng, Yi-Jie
Zhang, Jia-Ren
Liu, Yi-Hung
Hsia, Liang-Yu
Chen, Yun-Nung
Computation and Language
Recent advancements in large language models (LLMs) have enhanced natural-language reasoning. However, their limited parametric memory and susceptibility to hallucination present persistent challenges for tasks requiring accurate, context-based inference. To overcome these limitations, an increasing number of studies have proposed leveraging external knowledge to enhance LLMs. This study offers a systematic exploration of strategies for using external knowledge to enhance LLMs, beginning with a taxonomy that categorizes external knowledge into unstructured and structured data. We then focus on structured knowledge, presenting distinct taxonomies for tables and knowledge graphs (KGs), detailing their integration paradigms with LLMs, and reviewing representative methods. Our comparative analysis further highlights the trade-offs among interpretability, scalability, and performance, providing insights for developing trustworthy and generalizable knowledge-enhanced LLMs.
title LLM Inference Enhanced by External Knowledge: A Survey
topic Computation and Language
url https://arxiv.org/abs/2505.24377