ABAP Keyword Documentation → ABAP Glossary
Customizing include
Structure in ABAP Dictionary whose name has the prefix "CI_" for customers and "SI_" for partners and is in the customer namespace. The customizing includes in structures delivered by SAP are usually empty. They are not associated with existing structures and reserve only the names of the structures instead. In customer or partner systems, these includes can be enhanced in customizing by creating the incorporated customizing includes and using customizing transactions to give them components.