True or False: The primary purpose of CDTs is to structure and model data throughout the app.

The statement regarding the primary purpose of CDTs (Custom Data Types) is accurate; therefore, it should be recognized as true. CDTs are designed to structure and model data within an application, allowing developers to create complex data types that reflect the needs of the app's design and functionality. By defining CDTs, developers can encapsulate related data attributes into a single reusable structure, enhancing data integrity and coherence across the application.

CDTs facilitate better data management and improve the overall architecture by allowing for consistent data representation and validation. As a result, they play a crucial role in modeling data used in various expressions, processes, and user interfaces.

In contrast, the other choices do not align with the function of CDTs. False implies a misunderstanding of their role, sometimes suggests variability in their purpose which does not accurately reflect their consistent function, and not applicable is irrelevant in this context as CDTs have a clear defined role in data modeling within Appian applications.