SAP Master Data Governance provides an out-of-the box solution for the central management of various master data objects such as financial objects, supplier and material. However, SAP Master Data Governance also provides the flexibility to customize the solution, in cases where the pre-delivered content does not fully match customer requirements. You can use this guide to extend the MDG-S /MDG-C data model by a new Entity Type. The attributes of the new entity only exist in the MDG context and not in the ERP data models (flex option). Note This is not the right guide for you if you need an extension where the data is stored in tables outside of MDG (i.e. Partner Functions).