Mapping is a manual relation that you establish between the parameters of a data source object (in an SAP backend system) and the properties of an entity set in the Service Builder.
Service Builder enables you to map the data source for each of the CRUD (Create, Update, Read, Delete) and the query operations.
In the Service Builder, you can map the following types of data sources:
Remote Function Calls (RFC)
Business Object Repository (BOR)
The process of mapping data sources is the same regardless of the data source type.
For more information, see Creating the Mapping.
We recommend that, you familiarize yourself with the documentation for the specific SAP Remote Function Call (RFC), or BAPI you want to map to an entity set.