Export Constants tab
          Use this tab to display a list of constant values to export during export. This tab is displayed only if Interface Direction is set to Export. 
         
         You must specify this information to add a new constant value after clicking :
- Field Label
 - 
           The Excel column for which a constant value is to be mapped during the export process. 
           Note: The integer value must be greater than 0 when Interface Type is set to Excel.
 - Value
 - The constant value to be exported.