What is
RAG
RAG stands for Retrieval-Augmented Generation. Instead of answering from memory, the engine goes and fetches: it queries a search index or a document store, pulls the passages that match, and writes the answer from those. That is what makes an AI system auditable, because every statement traces back to a document.
Search is knowledge synthesis now.
…Frozen knowledge can't serve them. So generative engines run a division of labor. RAG does the semantic mapping: it connects fluid, drifting language to a knowledge base and pulls current content. Tool calling fetches live values from a specific provider. In…