Teradata Schema Workbench validates the syntax of MDX expressions that you enter for calculated measures, named sets, calculated members, and hierarchy default members. However it does not check the semantics of the MDX. Therefore, you should validate MDX expressions for correctness with another tool before using them in Teradata Schema Workbench to define calculations. Validating MDX Syntax explains how to use Microsoft Analysis Services 2000 MDX Sample to validate MDX fragments.