Answer / radhika

Table fields are defined in SAP R/3 by data elements and
domains. This is a key difference between SAP R/3 and many
other systems.
In other systems, a field is defined only by its type
(i.e., character, numeric) and length. These characteristics
are assigned directly to each field.

In SAP R/3, a field is defined by being assigned to a data
element, which is in turn assigned to a domain. These
assignments determine the field’s type and length in
addition to other characteristics.

SAP R/3 refers to this method of field definition as the
Two-Level Domain Concept

Answer / siddhu

Two different data elements using a same domain is called as two level domain concept.
Eg: you create two data elements for fields like STARTDATE and ENDDATE with respective field labels, but for both the data elements you assign DATS as the domain.

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