Semantic layer vs. data catalog : complementary tools explained. One defines what data means, the other inventories what data exists.
A metrics layer defines calculations; a semantic layer adds business context, joins, and governance. See how they relate and why the distinction matters.
A step-by-step plan for building a semantic layer: start with metrics, map sources, use bronze, silver, and gold views, document, and enforce access policies.
A semantic layer maps raw tables and columns to business terms and metrics so every BI tool and AI agent gets the same answer. Learn what it contains.
