JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. To Define a Split or Merge Rule On the Text Property tab, add a new entry to the Initial Values list by right-clicking a row and selecting Add Row(s). Set the Key column to split or merge. Make sure the return Value Type is set to the appropriate data type as defined for the property. Key Action Value Type Value Split or merge Keep the same value Value Value Split Divide based on area Cexpression ParentValue("PropTax") * (CurrentArea() / ParentArea()) Merge Sum two values Cexpression ParentSum("PropTax") Parent topic: Defining Split and Merge Rules