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ABAP Keyword Documentation → ABAP − Reference → Data Interfaces and Communication Interfaces → ABAP and XML → Transformations for XML → Simple Transformations → ST - Serialization and Deserialization →ST - Value Assignments
Note
When you assign values to the nodes of data roots, you must remember that the content of a data root cannot be modified by serialization; only write access is possible to a data root during deserialization.