LESSON 2.2
Metadata and filtered retrieval
Learn key techniques and workflows in Retrieval-Augmented Generation from Scratch.
12m
advanced
7,243 students
Overview
Metadata turns semantic search into scoped semantic search. Filtering by source, type, or date removes whole classes of wrong answer.
In this lesson you will:
- Attach source, type, and timestamp to every chunk
- Filter before ranking to cut the candidate set
- Use metadata to attribute answers back to a source
Pro Tip
Use caching and revalidation wisely to ensure your app stays fast and data remains fresh without unnecessary requests.