Attaching the List VO to an Attribute
Select the Attributes category along the left edge of the editor page, and select the DepartmentId attribute in the table that appears in the Attributes panel of the editor frame.
Select the attribute to which you want to add the LOV. Click the green arrow in the List of Values area. In the List of Values pane, select the Data Source and Attribute to be used for the LOV. In the List Return Values section, the value at the left should be the attribute from the Source view object, and the attribute at the right should be from the Data Source view object.