When designing a semantic layer, what specific mapping technique ensures that business metrics like 'Net Profit' remain consistent across multiple reporting tools by abstracting them from the underlying physical schema?

The specific mapping technique used to ensure metric consistency in a semantic layer is the definition of a centralized metric abstraction, often implemented as a semantic model or metric definition layer. This technique functions by creating a single, logical definition for a business metric like Net Profit that sits between the physical database tables and the reporting tools. Instead of each reporting tool calculating Net Profit using its own custom SQL....