Architecture
Physical location is not modeling intent — and both coexist.
A demystification: zones are physical/operational locations (Bronze/Silver/Gold, medallion); layers express modeling intent (harmonization, curation, marts). They are orthogonal, and conflating them is why medallion-vs-Data-Vault debates go in circles. Two named layers fall out: the Harmonization Layer (make sources technically and semantically compatible) and the Curation Layer (codify business rules, reference data and complex KPIs).
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