What a PRISMA Review Uncovers About Retrieval‑Augmented Generation (RAG)

This systematic PRISMA review analyzes 128 highly‑cited RAG papers, covering five major databases, 343 datasets, a detailed technical roadmap, evaluation metrics from EM to LLM‑as‑Judge, and future research directions, showing that RAG has evolved into a complex, programmable, and auditable distributed system.

AIDatasetsEvaluation Metrics

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What a PRISMA Review Uncovers About Retrieval‑Augmented Generation (RAG)