Reference Mode

If a table field is defined with a reference, the table field can have one of the following reference modes.

  • Mandatory

    The table field must contain a value that is present in the reference table.

  • Mandatory unless empty

    The table field can be empty. If the table field is filled, its value must be present in the reference table.

  • Not mandatory

    The table field can contain a value that is present in the reference table, but the table field can also contain an other value.