What is semantic layer in Power BI?

< 1 min read

In Power BI, the semantic layer is the data model where business logic is defined for reporting.
It includes tables, relationships, measures, calculated columns, and hierarchies.
This is where raw data is transformed into business-friendly metrics like Total Sales or Profit Margin.
In one project, I created DAX measures like YTD Sales and Customer Retention Rate in the semantic layer.
Report developers then reused these measures across multiple dashboards.
It ensures consistency because everyone uses the same definitions.
Instead of recalculating metrics in visuals, logic is centralized in the model.
This improves performance, governance, and single source of truth.

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