Code a simple RAG from scratch

Retrieval-Augmented Generation (RAG) is a cutting-edge AI paradigm that enhances the performance of Large Language Models (LLMs) by integrating information retrieval with text generation, thus utilizing external knowledge sources for improved outcomes in applications like question answering and content generation. The blog post outlines the construction of a basic RAG system using Python and the ollama tool, detailing its components: an embedding model for converting text into vector representations, a vector database for storing these vectors alongside knowledge, and a language model for generating responses based on retrieved data. The process involves indexing, where data is broken into chunks and represented as vectors, retrieval using cosine similarity to find relevant chunks, and generation where a chatbot crafts responses from these chunks. While the implementation is fundamental, it illustrates essential RAG concepts, with potential improvements including more efficient databases, advanced chunk processing, and larger language models. Additionally, the article touches on various RAG types like Graph RAG and Hybrid RAG, emphasizing RAG's significance in enhancing AI systems by incorporating external knowledge while maintaining generative capabilities.

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