SAP NEWS-773-RESTFUL

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ABAP RESTful Application Programming Model in ABAP Release 7.73
From release 7.73 on, the ABAP RESTful Application Programming Model (RAP) is introduced.
This mainly involves:

RAP Business Services (BS)

RAP Business Objects (RAP BO)

BDL for Behavior Definitions

ABAP Behavior Pools (ABP)

ABAP EML

BDEF Derived Types in the ABAP type concept.
In the beginning, so-called unmanaged RAP BOs can be created with the addition unmanaged of the RAP BDL when defining a RAP BO. This scenario is intended for brownfield developments with existing application code. All operations and services must be implemented by the application developer.