In an SAP development system, you have already created a role in a launchpad and configured an FBI view for a create by reference UI action. You have also created and configured a Web Dynpro application, and created and configured a UIBB. For more information, see:
Actions are business logic entities assigned to an application business object node. Actions are called either by a service consumer or by a business object. This document describes how you as an application developer can create a create by reference action on the UI.