Key Concepts

Term	Meaning
Petal	Atomic experience/place entity (enriched, rankable)
Trip	Structured itinerary scaffold with days, petals, notes
Intent	Normalized user request driving retrieval scope
Retrieval Set Cache	Cached list of candidate petal IDs keyed by normalized intent
Semantic Answer Cache	Cached generated answer tied to retrieval set hash
Delta Cache	Small patches applied after user edits or enrichment changes
Personalization Vector	Derived embedding or tag-weight map representing user interests
Diversification	Heuristic injecting high-distance petals to avoid monotony

Related schema pages: Petal, Trip, User Profile.