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Build RAG Systems

Learn to build Retrieval-Augmented Generation systems that let AI answer questions about your own documents and data.

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Chapter 1

What Is RAG and Why It Matters

RAG = Retrieval-Augmented Generation. Combines searching a knowledge base with generating answers. Without RAG, AI only knows training data. With RAG, it answers about YOUR documents and data.

Chapter 2

Document Processing and Chunking

Parse PDFs, Word docs, HTML. Split into chunks of 300-1000 tokens. Strategies: fixed-size, sentence, paragraph, semantic. Overlap 10-20% to preserve context.

Chapter 3

Vector Databases and Embeddings

Embeddings convert text to numbers capturing meaning. Vector DBs store and search fast. Options: ChromaDB, Pinecone, Weaviate, FAISS. Flow: document → chunks → embeddings → vector DB → search → LLM.

Chapter 4

Building a Complete RAG Pipeline

End-to-end: load documents → split → create embeddings → store → on query search relevant chunks → send chunks + query to LLM → return answer with sources. Using Python and LangChain.

Chapter 5

Advanced RAG Techniques

Hybrid search (keyword + semantic). Re-ranking for relevance. Query transformation. Multi-step RAG. Self-RAG. Evaluation: faithfulness, answer relevancy, context relevancy.

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