Composing Services 
Using the SAP NetWeaver Developer Studio, you can easily work with composite applications. Installed with the usage type CE-APPS are two options for composing applications:
Composing Services with Service Composer
Allows you to perform service composition using the Service Composer perspective of the Developer Studio.
You can still use the Composite Application Framework (CAF) perspective of the Developers Studio, which is well-known from previous releases . Note that the CAF composition toolset is integrated and its functionality can be used from the Service Composer perspective of the Developer Studio.
You can use data mappings to define how the source context data is transformed to the target context data. The SAP NetWeaver Developer Studio provides a mapping and expression editor where you define these transformations and create expressions over the context data.