Knowledge Enhanced Pretrained Language Models: A Compreshensive Survey
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Abstract (arXiv)
Pretrained Language Models (PLM) have established a new paradigm through learning informative contextualized representations on large-scale text corpus. This new paradigm has revolutionized the entire field of natural language processing, and set the new state-of-the-art performance for a wide variety of NLP tasks. However, though PLMs could store certain knowledge/facts from training corpus, their knowledge awareness is still far from satisfactory. To address this issue, integrating knowledge into PLMs have recently become a very active research area and a variety of approaches have been developed. In this paper, we provide a comprehensive survey of the literature on this emerging and fast-growing field - Knowledge Enhanced Pretrained Language Models (KE-PLMs). We introduce three taxonomies to categorize existing work. Besides, we also survey the various NLU and NLG applications on which KE-PLM has demonstrated superior performance over vanilla PLMs. Finally, we discuss challenges that face KE-PLMs and also promising directions for future research.
Key facts. Cited by 33 papers in the map (data through 14 Oct 2026). Builds on 84 of its 111 references that are in the map. First posted on arXiv 16 Oct 2021.
Builds on
84 of 111 references.
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Citing papers per year: 2022: 10; 2023: 10; 2024: 9; 2025: 4.
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- 2023Unifying Large Language Models and Knowledge Graphs: A Roadmapcited by 668
- 2023StructGPT: A General Framework for Large Language Model to Reason over Structured Datacited by 343
- 2022A Review on Language Models as Knowledge Basescited by 157
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- 2024Demystifying Chains, Trees, and Graphs of Thoughtscited by 63
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- 2023How Do Large Language Models Capture the Ever-changing World Knowledge? A Review of Recent Advancescited by 33
- 2022A Survey of Knowledge-Intensive NLP with Pre-Trained Language Modelscited by 30
- 2022SpaBERT: A Pretrained Language Model from Geographic Data for Geo-Entity Representationcited by 23
- 2023The Life Cycle of Knowledge in Big Language Models: A Surveycited by 23
- 2022KCD: Knowledge Walks and Textual Cues Enhanced Political Perspective Detection in News Mediacited by 20
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- 2025Knowledge Graph-based Retrieval-Augmented Generation for Schema Matchingcited by 13
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- 2024Knowledge-Guided Dynamic Modality Attention Fusion Framework for Multimodal Sentiment Analysiscited by 7
- 2023Distinguish Before Answer: Generating Contrastive Explanation as Knowledge for Commonsense Question Answeringcited by 6
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- 2025ConfRAG: Confidence-Guided Retrieval-Augmenting Generationcited by 4
- 2022Enhancing Document-level Relation Extraction by Entity Knowledge Injectioncited by 3
- 2022A Survey on Knowledge-Enhanced Pre-trained Language Modelscited by 3
- 2024Foundation Model Sherpas: Guiding Foundation Models through Knowledge and Reasoningcited by 3
- 2023Knowledge Graphs are not Created Equal: Exploring the Properties and Structure of Real KGscited by 1
- 2023Diversifying Knowledge Enhancement of Biomedical Language Models using Adapter Modules and Knowledge Graphscited by 1
- 2024Human Centered AI for Indian Legal Text Analyticscited by 1
- 2022KESA: A Knowledge Enhanced Approach For Sentiment Analysiscited by 0
- 2022DSTEA: Improving Dialogue State Tracking via Entity Adaptive Pre-trainingcited by 0
- 2024Adapter-based Approaches to Knowledge-enhanced Language Models -- A Surveycited by 0
- 2025MIDG: Mixture of Invariant Experts with knowledge injection for Domain Generalization in Multimodal Sentiment Analysiscited by 0
- 2025MIDG: Mixture of Invariant Experts with knowledge injection for Domain Generalization in Multimodal Sentiment Analysis8 Dec 2025
- 2025A Survey of Inductive Reasoning for Large Language Models11 Oct 2025
- 2025ConfRAG: Confidence-Guided Retrieval-Augmenting Generation8 Jun 2025
- 2025Knowledge Graph-based Retrieval-Augmented Generation for Schema Matching15 Jan 2025
- 2024Adapter-based Approaches to Knowledge-enhanced Language Models -- A Survey25 Nov 2024
- 2024Knowledge-Guided Dynamic Modality Attention Fusion Framework for Multimodal Sentiment Analysis6 Oct 2024
- 2024Adaptive Question Answering: Enhancing Language Model Proficiency for Addressing Knowledge Conflicts with Source Citations5 Oct 2024
- 2024Combining Knowledge Graphs and Large Language Models9 Jul 2024
- 2024Knowledge-aware Text-Image Retrieval for Remote Sensing Images6 May 2024
- 2024Incorporating External Knowledge and Goal Guidance for LLM-based Conversational Recommender Systems3 May 2024
- 2024Human Centered AI for Indian Legal Text Analytics16 Mar 2024
- 2024Foundation Model Sherpas: Guiding Foundation Models through Knowledge and Reasoning2 Feb 2024
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- 2024Demystifying Chains, Trees, and Graphs of Thoughts25 Jan 2024
- 2023Diversifying Knowledge Enhancement of Biomedical Language Models using Adapter Modules and Knowledge Graphs21 Dec 2023
- 2023Can Knowledge Graphs Reduce Hallucinations in LLMs? : A Survey14 Nov 2023
- 2023Knowledge Graphs are not Created Equal: Exploring the Properties and Structure of Real KGs10 Nov 2023
- 2023How Do Large Language Models Capture the Ever-changing World Knowledge? A Review of Recent Advances11 Oct 2023
- 2023ConKI: Contrastive Knowledge Injection for Multimodal Sentiment Analysis27 Jun 2023
- 2023Give Us the Facts: Enhancing Large Language Models with Knowledge Graphs for Fact-aware Language Modeling20 Jun 2023
- 2023Unifying Large Language Models and Knowledge Graphs: A Roadmap14 Jun 2023
- 2023StructGPT: A General Framework for Large Language Model to Reason over Structured Data16 May 2023
- 2023Distinguish Before Answer: Generating Contrastive Explanation as Knowledge for Commonsense Question Answering14 May 2023
- 2023The Life Cycle of Knowledge in Big Language Models: A Survey14 Mar 2023
- 2022A Survey on Knowledge-Enhanced Pre-trained Language Models27 Dec 2022
- 2022A Survey of Knowledge Enhanced Pre-trained Language Models11 Nov 2022
- 2022SpaBERT: A Pretrained Language Model from Geographic Data for Geo-Entity Representation21 Oct 2022
- 2022Enhancing Document-level Relation Extraction by Entity Knowledge Injection23 Jul 2022
- 2022DSTEA: Improving Dialogue State Tracking via Entity Adaptive Pre-training8 Jul 2022
- 2022Visually-Augmented Language Modeling20 May 2022
- 2022A Review on Language Models as Knowledge Bases12 Apr 2022
- 2022KCD: Knowledge Walks and Textual Cues Enhanced Political Perspective Detection in News Media8 Apr 2022
- 2022KESA: A Knowledge Enhanced Approach For Sentiment Analysis24 Feb 2022
- 2022A Survey of Knowledge-Intensive NLP with Pre-Trained Language Models17 Feb 2022
- 2023StructGPT: A General Framework for Large Language Model to Reason over Structured Datacited by 343
- 2024Demystifying Chains, Trees, and Graphs of Thoughtscited by 63
- 2025A Survey of Inductive Reasoning for Large Language Modelscited by 8
- 2024Foundation Model Sherpas: Guiding Foundation Models through Knowledge and Reasoningcited by 3
- 2023Knowledge Graphs are not Created Equal: Exploring the Properties and Structure of Real KGscited by 1
- 2025A Survey of Inductive Reasoning for Large Language Models11 Oct 2025
- 2024Foundation Model Sherpas: Guiding Foundation Models through Knowledge and Reasoning2 Feb 2024
- 2024Demystifying Chains, Trees, and Graphs of Thoughts25 Jan 2024
- 2023Knowledge Graphs are not Created Equal: Exploring the Properties and Structure of Real KGs10 Nov 2023
- 2023StructGPT: A General Framework for Large Language Model to Reason over Structured Data16 May 2023
- 2023Unifying Large Language Models and Knowledge Graphs: A Roadmapcited by 668
- 2022A Review on Language Models as Knowledge Basescited by 157
- 2023Can Knowledge Graphs Reduce Hallucinations in LLMs? : A Surveycited by 92
- 2022A Survey of Knowledge Enhanced Pre-trained Language Modelscited by 76
- 2023Give Us the Facts: Enhancing Large Language Models with Knowledge Graphs for Fact-aware Language Modelingcited by 56
- 2023How Do Large Language Models Capture the Ever-changing World Knowledge? A Review of Recent Advancescited by 33
- 2022A Survey of Knowledge-Intensive NLP with Pre-Trained Language Modelscited by 30
- 2022SpaBERT: A Pretrained Language Model from Geographic Data for Geo-Entity Representationcited by 23
- 2023The Life Cycle of Knowledge in Big Language Models: A Surveycited by 23
- 2022KCD: Knowledge Walks and Textual Cues Enhanced Political Perspective Detection in News Mediacited by 20
- 2022Visually-Augmented Language Modelingcited by 18
- 2024Combining Knowledge Graphs and Large Language Modelscited by 16
12 most cited of 26 All 26 (JSON)
- 2025MIDG: Mixture of Invariant Experts with knowledge injection for Domain Generalization in Multimodal Sentiment Analysis8 Dec 2025
- 2024Adapter-based Approaches to Knowledge-enhanced Language Models -- A Survey25 Nov 2024
- 2024Knowledge-Guided Dynamic Modality Attention Fusion Framework for Multimodal Sentiment Analysis6 Oct 2024
- 2024Adaptive Question Answering: Enhancing Language Model Proficiency for Addressing Knowledge Conflicts with Source Citations5 Oct 2024
- 2024Combining Knowledge Graphs and Large Language Models9 Jul 2024
- 2024Knowledge-aware Text-Image Retrieval for Remote Sensing Images6 May 2024
- 2024Incorporating External Knowledge and Goal Guidance for LLM-based Conversational Recommender Systems3 May 2024
- 2024Human Centered AI for Indian Legal Text Analytics16 Mar 2024
- 2023Diversifying Knowledge Enhancement of Biomedical Language Models using Adapter Modules and Knowledge Graphs21 Dec 2023
- 2023Can Knowledge Graphs Reduce Hallucinations in LLMs? : A Survey14 Nov 2023
- 2023How Do Large Language Models Capture the Ever-changing World Knowledge? A Review of Recent Advances11 Oct 2023
- 2023ConKI: Contrastive Knowledge Injection for Multimodal Sentiment Analysis27 Jun 2023
12 newest of 26 All 26 (JSON)