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Retrieval-Augmented Generation (RAG)

A definition from the GenAI for Business glossary.

RAG connects an AI model to external information sources (like documents or databases). The model first retrieves relevant facts (like a "librarian") and then generates a response using that material (like an "author"). It keeps AI answers accurate, up-to-date, and grounded in real data, essential for enterprise use cases.

Want the full picture? This term comes from GenAI for Business, a complete free book on generative AI strategy and implementation by Prof. Shubin Yu (HEC Paris).
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