Domain in SAP ABAP

Domain in SAP ABAP

Learning domains in ABAP data dictionary is the most important and basic part to learn technical aspect about the domain as abap consultant.

Domains are used to define a value ranges. Each and every domain is assigned to a data element. All table fields or structure components  uses the data elements then data elements have the value range defined by the domain. The relationship between the field or component and the domain is defined by the data element of the field or component.

All table Fields or components that refer to the same domain are also changed automatically when that domain is changed.

The value range of all domains are defined by specifying a data type and length .

The value range of a domain can be restricted by defining fixed values. 

If all the fields of the table that refer to the domain can be checked against a certain table, this table can be created as the value table of the domain.

We can define output attributes  for all the fields or components that refer to the domain . 

We can assign conversion routine  to a domain for converting values from display format to internal format for the fields or components that refer to this domain.