1. webServiceDataSource1URL - For the Service URL we are using the inline variable "@url" and for Value and design time value we are using the "https://services.odata.org/TripPinRESTierService/People"
2. webServiceDataSource2NoURL - For the service URL we are directly using the "https://services.odata.org/TripPinRESTierService/People"
In scenario #1 there occurs an error "An error occurred while loading the data schema for 'webServiceDataSource1URL': unexpected token | in JSON at position 0".
The fields for #2 are loaded and for #1 are not.