The SAP NetWeaver Gateway exposes OData with extensions specific to SAP. Service documents, that describe service interaction and data, allow users to interact with the SAP application.
Where an OData source is used as the back-end the application developer does not need to create any model elements (MBOs) in the tooling but rather inherits a service model from the service document published from SAP NetWeaver Gateway. These OData service documents contain all the information the device developer needs to parse and interact with these data streams.
See documentation for SAP NetWeaver and for SAP NetWeaver Gateway for additional information.