Retrieval-Augmented Generation combines the generative capabilities of LLMs with the precision of targeted information retrieval. In essence, it applies the power of genAI to highly customizable contexts by leveraging proprietary, text-based data sets.
The core components of RAG include:
- A large language model (LLM)
- A comprehensive knowledge base or document store
- An efficient retrieval system such as Dense Passage Retrieval (DPR) for quickly finding and accessing relevant information
- A mechanism, such as Llamaindex or direct API integration, for integrating retrieved information with LLM outputs
The operational mechanics of the RAG process can be distilled into two key steps:
- Information retrieval: The system identifies and extracts the most pertinent information from various data sources, including structured databases and unstructured documents.
- Augmented generation: Utilizing the retrieved information, the model produces a response that is both coherent and contextually relevant, ensuring outputs that are not only creative but also firmly grounded in accurate data.