# RAG on PDFs with file search

Chunk documents, search with citations, and answer precisely.

- Date: Mar 11, 2025
- Reading time: 20 min
- Level: Intermediate
- Tags: Responses, Search, Citations

## Takeaways
- Use chunk overlap to keep context intact.
- Return citations for every claim.
- Score retrieval quality with evals.

## Chunking strategy

Split PDFs into overlapping chunks with metadata like page and section labels.

## Retrieval and reranking

Retrieve with embeddings, then rerank for precision before answering.

## Citations

Attach citations and section IDs to every response so users can verify sources.