The tables defined on the S.40.12 Commodity Geometrics screen are used for establishing commodity-geometric relationships, and subsequently for generating idents.
To define a geometric, type the name in the Geometric field, select a table name from the LOV in the Tablename field, and type the table description in the Short Desc and Description fields. The tablename and the structure (attributes) are defined on A.50.02 and A.50.03, see Definition of User-Defined Geometric Structure.
On Window 2, you define the geometric details as shown below.