SuperBizAgent-java/eval/rag-retrieval/seed-docs/rag-l0-domain-entity-hint.md

title, keywords, summary, category, source, breadcrumb, kb_scope, covers, when_to_retrieve

title	keywords	summary	category	source	breadcrumb	kb_scope	covers	when_to_retrieve
RAG L0 Domain Entity Hint	L0 keyword matching final retrieval result domain detector entity extractor metadata filter	Define L0 as a query transformation hint layer instead of final retrieval evidence.	rag	rag-l0-domain-entity-hint	RAG > L0 > Domain Entity Hint	rag-eval	l0 hint query transformation metadata filter	Use when a question asks whether L0 should decide final retrieval or only provide hints.

RAG

L0

Domain Entity Hint

L0 keyword matching should not decide the final retrieval result. In the modular RAG pipeline, L0 behaves like a lightweight domain detector and entity extractor.

The output can provide:

1. Candidate domain hints.
2. Matched entities and keywords.
3. An optional metadata filter for the first vector retrieval attempt.

Final evidence still comes from L1 vector retrieval, post-retrieval normalization, rerank, and context packing. The important terms are domain detector, entity extractor, and metadata filter.