1. SAP Help Portal - Configuration of Master Data Governance for Supplier 9.2: In the section "Prerequisites", the documentation lists the required business functions to be activated. It explicitly mentions CABPSOA and CASUPPLIERSOA. It also lists Master Data Governance, Generic Functions (MDGFOUNDATION9), which contains the DRFFOUNDATION switch as a core component.
Source: SAP Help Portal, "Configuration of Master Data Governance for Supplier 9.2", Section: "Prerequisites".
2. SAP Help Portal - Business Functions for Master Data Governance: This documentation outlines the structure of MDG business functions. It clarifies that DRFFOUNDATION is a switch within the main MDGFOUNDATION business function, establishing it as a fundamental building block for all MDG domains, including Supplier.
Source: SAP Help Portal, "Master Data Governance", Section: "Business Functions for Master Data Governance".
3. SAP Community Wiki - MDG-S Configuration: Technical articles and configuration guides on the official SAP Community platform consistently detail the activation of these three business functions (DRFFOUNDATION as part of the foundation, CABPSOA, and CASUPPLIERSOA) as the initial and mandatory step for setting up MDG for Supplier.
Source: SAP Community Wiki, "How to configure MDG-S (Supplier)", Section: "Activate Business Functions".