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ABENBDL_EXTENSION - BDL EXTENSION

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- BDEF Extension

A BDEF extension is a transportable extension of a CDS behavior definition. BDEF extensions can be added to BDEF implementation types managed, unmanaged, and projection.

A BDEF extension can make additions to the original BDEF, but it can't modify, overwrite, or delete elements from the original BDEF. The following extensions are possible: field extensibility, behavior extensibility, node extensibility. A RAP BO extension itself cannot be further extended.

• Section Extensibility Enablement: As a prerequisite for BDEF extensions, the behavior definition must be explicitly enabled for RAP extensibility.

• Section BDEF Extension for RAP BOs: All available extension features for RAP BOs of type managed and unmanaged are described.

• Section BDEF Projection Extension: All available extension features for BDEF projections are described.

The following image shows the role of BDEF extensions within the ABAP RESTful Application Programming Model.

IMAGE @@BDEF_projection_extension.jpg@@710@@300@@

• Development guide for the ABAP RESTful Application Programming Model, section Extend.

• C0 stability contract for extensions

• DDIC - Extensions

• ABAP CDS - CDS Entity Extension

• CDS service definition extension

Notes

• BDEF extensions are connected to Switch Framework whenever they are defined in a package that is assigned a switch.

• BDEF extensions themselves and each single extension element should use a separate namespace to avoid naming conflicts with extended elements. BDEF extensions created in non-SAP and non-partner development systems should use the customer namespace prefix Z or ZZ.

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