Why do you assign semantic types to measures or attributes in calculation views?

Assigning semantic types to measures or attributes in calculation views is primarily done to allow client applications to present data in appropriate formats. The semantic types act as metadata that informs the client layer about the nature of the data, enabling it to render the data correctly based on its type—be it currency, percentage, date/time, or another format. This is crucial for ensuring that end-users receive the data in a visually and contextually informative manner.

Through semantic types, the display of data is optimized for the end-user experience, enhancing comprehension and usability. For example, amount values might be displayed with currency symbols, while date values would likely be formatted to reflect the user's locale preferences.

While other options touch on relevant aspects - like providing meaningful value help, enabling view activation, and ensuring consistency - the core purpose centers around enhancing the way data is ultimately presented and interacted with in client applications. Such proper formatting is essential for effective data analysis and visualization.