SAP DATA OBJECTS CHANGEABILITY documentation, setup help and usage info

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Variable and Constant Data Objects
With respect to the changeability of data contents ,distinction can be made between variable and constant data objects:

Variable data objects can change their value at runtime. All data objects that are not defined by a statement defining data CONSTANTS are variable.

Constant data objects always retain their initial value. They include the literals , text symbols , and the constants declared by CONSTANTS .

SAP DATA OBJECTS CHANGEABILITY documentation, setup help and example usage