Create the web service manually.
Manually create the web service if the response message contains data that the resource mapping must calculate or format. Manually create the web service if the mapping has multiple sources. When the response message contains hierarchical data or multiple-occurring data, you must manually define the structure.
Create the web service from a data object.
If the response message contains data that is from one data object, you can create the resource definition based on the data object. You can choose specific columns from the data object and you can change the resource mapping after you create the web service.