Unity Catalog Business Semantics brings a shared way to define metrics, dimensions, and rules at the data layer.Instead of definitions living inside BI tools, teams and AI agents can work from the same governed logic across dashboards, queries, and notebooks. Metric Views provide consistent KPIs with lineage, permissions, and performance optimizations. The core implementation is being open sourced in Apache Spark to support portability across systems. Unity Catalog Business Semantics is now GA: