In this dialog, the following system values can be defined for subsequent assignment to data fields:
System Data Group
Select the corresponding Type in the first selection list. The Application is pre-selected, if you are in e.g. a
data group action. In other cases, select the required application. In the Value selection list the corresponding variable
names of the system values can be selected, or can be entered if you do not open the list, but type directly in the value field.
With System data group, the fixed value will be taken from a field from an application. In the Application selection list,
only the applications that contain a system data group can be selected. Select the required user property from the list.