Create Semantic Models and Semantic Calculated Dimensions and Measurements. Use Tableau Semantics APIs to create highly customizable Semantic ModelsUse the Connect API to create Semantic Models and Semantic Definitions. The Tableau Semantics Connect Authoring API is a REST API that allows you to create, update, and delete Semantic Models and their components.Use the Query API to perform Semantic Queries. The Tableau Semantics Query Generator API generates optimized SQL calls over Data Cloud Objects.