You identify a conformed dimension between your FDI and external application. You intend to use the External Application feature to leverage the conformed dimension.Which statement is a prerequisite from a design perspective?

You identify a conformed dimension between your FDI and external application. You intend to use the External Application feature to leverage the conformed dimension.Which statement is a prerequisite from a design perspective?

• A. The data types of the conforming columns must match.
• B. The column names must be identical across both systems.
• C. The columns must have the same length, but types can vary.
• D. The columns must be indexed the same way.

Answer: (A)

Ensuring data type compatibility for the conforming columns across the systems is the essential prerequisite when using an External Application to leverage a conformed dimension. If the data types match, the integration can join and compare keys reliably, avoiding implicit casts that can lead to incorrect results or data loss and preserving the integrity of the dimension’s semantics. Column names can be mapped as needed by the integration layer, so they don't have to be identical across systems. Likewise, having the same length alone isn’t enough if the types differ, since a mismatch in type can still cause errors or misinterpretation of values. Indexing can improve performance, but it isn’t a hard prerequisite for establishing the conformed dimension linkage.

Ensuring data type compatibility for the conforming columns across the systems is the essential prerequisite when using an External Application to leverage a conformed dimension. If the data types match, the integration can join and compare keys reliably, avoiding implicit casts that can lead to incorrect results or data loss and preserving the integrity of the dimension’s semantics.

Column names can be mapped as needed by the integration layer, so they don't have to be identical across systems. Likewise, having the same length alone isn’t enough if the types differ, since a mismatch in type can still cause errors or misinterpretation of values. Indexing can improve performance, but it isn’t a hard prerequisite for establishing the conformed dimension linkage.