A. Use the <Association></Association> tag as a representation of the relationship between Entity Types

B. Define the structure of the payload that the Integration APi will support for both inbound and outbound requests

C. Use ComplexType and EdmSimpleType as part of the < Associations></Associations> tag

D. By use odata2webservices to get the EDMX schema for the Integration Object

E. Update the EDMX schema by downloading changes it and re-uploading it within the SAP Commerce cloud backoffice