In a batch mode for Marc, Items, or Patron, it would be convenient to add different data to a field from a file. The file would be the same used for the records being modified. The Marc modification template would also have to be able to select a file for input. Example: Marc batch modification. Add field 028 $a & $b where $a is different for each record being inputted. $b would be the same and be specified in the template.