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One limitation of External Fields is they cannot be used when creating computed fields. |
Deleting External Variables
Be cautious when deleting variables that may be in use on conditional actions. If the study status is Live and the variable is being used, the system will prevent deleting.
Constants
Constants are nearly identical to External Fields. They are used in exactly the same way. However, they are not user-defined. Instead, the system defines constants for Users and automatically populates the criteria dropdown. Currently, Constants can be used in all conditional actions, including computed fields. The following constants are available:
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