Fixed Values
The value range of a domain can be further restricted by defining fixed values. If fixed values are defined for a domain, these are used in the input check in screen templates. If no other means of help is defined for a field (
search help,
foreign key), the fixed values are also offered in the input (F4) help.
Domain S_CLASS (data type CHAR, length 1) in the
flight model describes the possible classes of a flight booking. The value range of domain S_CLASS is defined by the fixed values C (business class), F (first class) and Y (economy class). Only the values C, F and Y may be entered in screen templates for all the fields that refer to this domain.
You can define fixed value intervals either by entering upper and lower limits or by specifying single values. Value ranges and single values can be combined as required. You can enter an explanatory text for every single value or interval; it is displayed in the input help.
It is only possible to define fixed values for domains of data types CHAR, NUMC, DEC, INT1, INT2 and INT4. There is only an input check of the template for data types CHAR and NUMC.