Assignment rule command

When a system variable is used as the Source parameter in a rule command, you assign the value in the system variable to a record/field, a memory variable, or another system variable. When a system variable is the Destination parameter in a rule command, you assign the value of a constant, a record/field, a memory variable, or even another system variable to the system variable.

Parameter name	Variable
Source	Memory Variable Record/Field System Variable Constant Parameter
Destination	Memory Variable Record/Field System Variable