What Is RAG? Follow One Question from Source to Answer
Blog post from Supermemory
Retrieval-augmented generation (RAG) supplies language models with relevant, current source passages at query time rather than retraining them, but reliable answers depend on the full pipeline from document ingestion through retrieval and generation. Documents must be split into searchable passages while preserving metadata such as source, section, version, and access permissions, and systems may combine embeddings for semantic matching with lexical indexes for exact terms. At question time, applications must authenticate users, filter sources by authorization, retrieve and rank evidence, and provide sufficient contextual passages to preserve exceptions and conditions, with citations linking directly to supporting material. Failures can arise from missing or incorrectly indexed policies, improper access filtering, weak ranking, lost context, ignored exceptions, or genuinely absent evidence, so evaluating both retrieved support and final answers is essential. A practical starting point is a small test set containing direct, conditional, revised-policy, and unanswerable questions, with expected evidence recorded before expanding retrieval features or considering routing, chunking, embedding, and managed-search options.
| Trend | Post Mentions | Total Month Mentions | Posts | Companies | MoM |
|---|---|---|---|---|---|
| RAG | 7 | 1,224 | 285 | 102 | +22% |
| Vector Search | 2 | 2,241 | 449 | 143 | +17% |
| LLM | 1 | 7,655 | 1,347 | 245 | +22% |
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