Modeling External Services
Use
You can use remote function calls (RFC) including BAPIs or Web services to access data from an external source such as SAP Systems or any system that supports the industry Web services standard. You cannot change the imported information however you can reimport the external service if it has been changed.
Procedure
1. Import RFC or a Web service.
More information:
2. Integrate the service in your application.
More information: Mapping Service Operations
More Information
External Services