Retrieval That Survives Contact
RAG for a corpus that won't sit still
A book by Alpesh Nakrani
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- Pages
- 105
- Chapters
- 11
- Format
- PDF · 19.9 MB
What's in the book
Retrieval looks solved in the first week and broken by the first quarterly review. The culprit is almost never the model. It is distribution shift in the corpus and the questions. This manual covers chunking, reranking, query rewriting, and the measurement that tells you which one to fix.
The demo retrieves perfectly; month three it collapses. Building retrieval that holds as the corpus grows and the queries drift.
Table of contents
PDF page- INTIntroduction: The Corpus Moved9
- 01The CORPUS Inventory You Skipped15
- 02Parsing Is Part of Retrieval23
- 03Chunking Documents That Won't Sit Still30
- 04Dense, Sparse, Hybrid, and Late Interaction38
- 05Rewriting the Question Before You Answer It45
- 06Reranking and Context Assembly52
- 07Metadata as Operational Control59
- 08Permissions Before Retrieval67
- 09Freshness, Versioning, Deletion, and Reindexing73
- 10Evaluating Retrieval Apart from Answers81
- 11Where the Answer Begins89
- ENDConclusion: Current, Authorized, Useful96
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