SAP NetWeaver - Demo Model 
The Demo Model provides packaged demo content that is shipped with SAP NetWeaver. You can access this content in different SAP NetWeaver technologies without additional effort. The context for the Demo Model is the demo company ITelO. ITelO manufactures high-tech products such as laptops and printers. It is a global player that has several subsidiaries world-wide and sells its products through direct and indirect distribution channels.
What can I do with it?
Evaluating different SAP NetWeaver technologies and components
Service consumption with different SAP NetWeaver technologies like Web Dynpro and Composite Application Framework (CAF)
Service implementation and provisioning
Working with the Enterprise Services Repository (ES Repository)
Service Interfaces assignment for automated activities (SAP NetWeaver Business Process Management) or callable objects (Guided Procedures)
How can I use it?
Use the Demo Enterprise Services provided by the Demo Model and import the definitions of the services into the ES Repository.
For more information, see the Demo Model home page https://www.sdn.sap.com/irj/sdn/nw-demomodel. In the SAP NetWeaver Composition Environment section, see the document about Java Demo Enterprise Services according to your SAP NetWeaver version.
Import the source code of the Demo Model into your SAP NetWeaver Developer Studio (Developer Studio) and have a look how it is implemented.
On the Welcome page, you find the information how to do that.
In the Developer Studio choose
Help 
Welcome Samples 
.Refer to SAP NetWeaver — Demo Model section.