SAP How-To Guide: Extend the MDG Business Partner - Create and Register a Custom Handler Class
SAP Master Data Governance provides out-of-the box solutions for the central management of master data objects. Domain-specific solutions include supplier governance (MDG-S), customer governance (MDG-C), material governance (MDG-M), and financials governance (MDG-F). If your domain-specific solution does not fully meet requirements, you can customize and extend it. You can use this guide to extend the MDG Business Partner (including MDG-C and MDG-S) by creating and registering a custom handler class.