The WSDL Generator for SAP RFC service creates WSDL-Files from SAP RFCs in order to import them into a Builder project. The service provides a user interface (UI) to trigger the generation. With this UI you can either request a list of RFCs by putting them into the corresponding field in the UI, or you can specify a simple file as input containing a list of all RFCs. Using a file might be handy in case you have to recreate the WSDL at a later date.