SAP Gateway Service Builder provides a variety of data modeling options to simplify the data modeling process for you significantly by enabling you to reuse existing data models or redefine existing services. Depending on your development experience and your time, you can choose which option is best suited to your needs.
If you want to reuse an existing data model instead of defining a new data model, you can:
Import Model by uploading a file (.edmx or .xml) containing predefined data you want to reuse in your Service Builder project.
Import DDIC Structure to reuse an existing ABAP structure as a complex type or entity type.
Import Data Source to implement RFC or BOR generators.
Alternatively, you can: