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Retrieval-Augmented Generation: A Comprehensive Survey of Foundations, Evolution, Applications, Limitations, and Future Directions

Junzhe Feng (Xiamen University Malaysia), MohammadMahdi Ariannejad (Xiamen University Malaysia), Intan Izafina Idrus (Taylor's University), Zhe Kai Goh (Xiamen University Malaysia), Jian Ding Tan (Xiamen University Malaysia), Chia Chao Kang (Xiamen University Malaysia), Mohammad Arif Sobhan Bhuiyan (Xiamen University Malaysia), Wei Hown Tee (Taylor's University)

IEEE International Conference on Recent Advances and Innovations in Engineering (ICRAIE)
Licence : non indiquée (tous droits réservés)

Résumé : Retrieval-augmented generation (RAG) is one of the best methods for performing language tasks these days. RAG uses large language models with external tools for better accuracy, correctness, and contextual understanding. The review discusses key concepts in RAG, how RAG differs from previous systems that retrieved or generated content, how RAG is utilized in question answering, knowledge management, and content generation, and it discusses some limitations, including quality of retrieval, requirement for high-performance computers, complicated integration, as well as data privacy problems, and presents new approaches to address these limitations. The review examines over a quarter-century of key recent studies and concludes with some future research areas, such as multimodal RAG, novel methods for retrieval, personalization, ethics, explanability, as well as incorporating human feedback. The review seeks to make the reader understand RAG's current state as well as future research areas through intensive discussion as well as lucid examples.

Publié le 23 Aoû. 2025