The ABAP Cloud Development Model is the official and mandatory framework for creating cloud-native applications and extensions in SAP S/4HANA Cloud, public edition, and the SAP BTP, ABAP Environment. This model ensures that all development is lifecycle-stable and cloud-ready by enforcing a strict set of rules. Key characteristics include the exclusive use of public, released SAP APIs and extension points, a restricted ABAP language scope optimized for the cloud, and the mandatory use of the ABAP RESTful Application Programming Model (RAP) for building services and SAP Fiori apps.

A. BAP RESTful Application Programming Model: This is incorrect. Assuming a typo for "ABAP," the ABAP RESTful Application Programming Model (RAP) is the specific framework for building services and UIs, but it is a component within the broader ABAP Cloud Development Model, not the model itself.

B. The SAP S/4HANA Cloud Extensibility Model: This is incorrect. This model describes the methods for extending SAP S/4HANA Cloud (e.g., in-app vs. side-by-side), but the ABAP Cloud Development Model is the specific technical rule set used for the actual coding within those extension methods.

1. Official Vendor Documentation: SAP Help Portal

ABAP Cloud - Development. "ABAP Cloud is the ABAP development model to build cloud-ready business apps

services

and extensions on SAP BTP ABAP Environment

SAP S/4HANA Cloud

public edition

and SAP S/4HANA Cloud

private edition." It further clarifies that this model includes "ABAP language version Cloud" and the "ABAP RESTful Application Programming Model (RAP)".

Source: SAP Help Portal

Document Version: 2.0

2024-05-13. Section: "ABAP Cloud".

2. Official Vendor Documentation: SAP Help Portal

ABAP RESTful Application Programming Model. "The ABAP RESTful Application Programming Model (RAP) defines the architecture for efficient end-to-end development of intrinsically SAP HANA-optimized OData services (such as Fiori apps) in SAP BTP ABAP Environment or Application Server ABAP." This positions RAP as the transactional model used within the ABAP Cloud context.

Source: SAP Help Portal

Document Version: 2.0

2024-05-13. Section: "ABAP RESTful Application Programming Model".

3. Official Vendor Documentation: SAP Help Portal

Extensibility Guide for SAP S/4HANA Cloud. This guide details the extensibility model

which includes "On-stack developer extensibility". It specifies that this type of extensibility "is based on the ABAP Cloud development model". This confirms that the extensibility model uses the ABAP Cloud Development Model.

Source: SAP Help Portal

Document Version: 2.0

2024-05-13. Section: "Extensibility".