Application settings are enhanced so that you can reference application settings in your rules in order to specify separate values for each production level. At runtime, the setting holds the correct value for the application's current production level. 

You can now manage your application settings more effectively with the following enhancements:

• Create categories to organize your application settings, define their purpose, and make them easier to search for. Create parent categories to group several child categories that relate to the parent category, for example, Integration.Security.
• Specify a value type, such as Boolean or String/text. This defines how the application settings are rendered in the Application settings landing page in App Studio.
• Use the reusable UI control to reference application settings in rules. Configure the control's parameters to define how application settings display in other rules.
• Use application settings for the base URL and authentication profile in connect REST or service REST rules.

In previous releases, application settings were called Rule Admin System Settings. 

The following image is an example of a connect REST rule that uses the reusable UI control to surface an application setting for the base URL. Press the Down arrow key in the Base URL field to select an existing application setting, or select Create New Setting. 

For more information, see Creating an application setting and Categorizing application settings.