SAP Field Service Management provides a RESTful (Representational State Transfer) API, known as the Data API, for accessing and manipulating its data. To update an existing record, a developer would send an HTTP PATCH request to the specific object's endpoint. This request includes the object's unique identifier and a JSON payload containing the fields to be modified. This approach aligns with the standard principles of REST architecture for performing partial updates on resources.

B. Using an OData service: While OData is built on REST principles, the SAP FSM Data API is documented as a general RESTful API and does not adhere to the specific OData protocol conventions.

C. Using an RFC-enabled service: RFC (Remote Function Call) is a proprietary SAP protocol used for communication between ABAP-based systems (e.g., SAP S/4HANA) and is not the technology used for the FSM cloud API.

D. Using a SOAP-based service: The SAP FSM API is built on the modern REST architectural style, which uses standard HTTP methods, not the older, more rigid SOAP (Simple Object Access Protocol) protocol.

1. SAP Help Portal

SAP Field Service Management Developer Guide

Data API - Introduction: "The Data API is a RESTful API that allows you to access and manipulate data in SAP Field Service Management." This statement confirms the fundamental architecture of the API.

2. SAP Help Portal

SAP Field Service Management Developer Guide

Data API - Core Concepts

HTTP Verbs: This section explicitly lists the standard HTTP methods used. It specifies: "PATCH: Updates an existing object. You can use this method to update one or more properties of an object." This directly confirms the method for updating a record.