Advanced RAG in Retrieval-Augmented Generation

Lessons in this section

1. Multimodal RAG

   Retrieving from images, screenshots, tables and scanned pages: captions and OCR, tables as Markdown or CSV, OCR clean-up, layout analysis, shared text-image vector spaces and multi-vector page matching.

2. Advanced Retrieval Patterns

   Handling questions that need several steps: decomposition, stepwise and multi-hop retrieval, agentic RAG with tool loops and stop rules, Self-RAG reflection, and GraphRAG entity graphs and community summaries.

3. RAG Security

   Securing RAG systems: RBAC and tenant filters before retrieval, server-side scope, indirect prompt injection, data vs instruction layers and trust levels, PII redaction, retention and deletion, encryption and audit logs.