Pattern
LlamaIndex
Provide a Python framework whose core abstractions are organized around retrieval: documents become nodes; nodes feed indexes; indexes produce retrievers; retrievers compose into query engines; query engines compose into agents. The framework's opinionation matches the shape of production RAG.
Classification — Retrieval-first framework with native abstractions for the full RAG stack.
Full entry
The complete treatment — problem, how it works, when to use it, sources, and examples — lives in the volume below.
Browse the full pattern index or the catalog.