The REST services you define using the New REST service wizard appears under the Defined Services node in your REST project.
The REST service artifacts are generated under .services/Expose/rest/service_name in your project directory, where service_name is the name of the defined REST service. A separate REST service node is created for each REST service you define, and its artifacts are generated under that REST service.
Note: The .services node does not appear by default under your project in the Project Explorer view. To view the .services node, open Available Customizations dialog (select View Menu > Customize Menu from the Project View toolbar), clear the .*resources check box, and then click OK.
Each of the REST service node includes the following two files:
resourceModel.xml - Includes the resource URI information.
spring.xml - Includes the AppServer end point details, resourceModel.xml, and mapping.xml entry.
Note: Progress recommend you to not modify or delete any file under the .services node in your REST project.