1. The ZERO-FILL and NUMERIC-FILL phrases may be applied only to alphanumeric input or update fields. These phrases are ignored for output fields. Only one of these options may be specified for a single field.
  2. The ZERO-FILL phrase causes trailing spaces in the entered data to be replaced by the 0 character. If the destination is JUSTIFIED, then leading spaces will be replaced instead.
  3. The NUMERIC-FILL phrase causes the runtime system to examine the entered data. If the entered value consists entirely of digits and trailing spaces, then the entered digits are right justified and the leading character positions are replaced by the "0" character. If the entered data is empty, or contains any non-digit characters, the data is left alone.