This section describes the procedure for deriving attributes from fields.
If you wish to assign a GUID to a table field as a technical object identifier, the field must be of type OS_GUID.
To define the assignment of single-valued attributes, key attributes, and GUIDs:
The attribute name, description, and attribute type are completed automatically. The remaining fields display suggested values. The suggested values are based on information stored in the ABAP Dictionary about this field:
For a GUID, do not accept the suggested value Object reference for the assignment type, but select the entry GUID instead.
For all database tables that have a business key as a primary key, you must derive all key fields of the table from persistent attributes to ensure the uniqueness of this type of key.