ABAP Keyword Documentation →  ABAP - Reference →  Predefined Types, Data Objects, Functions, and Constructors 

Predefined Data Objects

ABAP programs have access to a range of predefined data objects:

• ABAP System Fields

• The Constant space

• The Self Reference me

The obsolete predefined structure screen also exists.

Other versions: 7.31 | 7.40 | 7.54

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ABAP System Fields

The Constant space

The self-reference me