This article is supplementary to article described here. This KB Article explain another technique that can be used to create a new webservice. The subtle difference with this approach is that the user is able to create a serviceid, instead of the Rapidminer server using the default i.e the process name.
Following are the steps needed to create a web service directly from the server interface
Navigate to your server url and login
After login is successfull, using the menu on the left navigate to the services section.
On the next screen click on the "Create new service" link towards the top right of the screen
On the next screen that appears as below, you will be able to provide a service id(Marked 1) and then also aselect the Datasource (Marked 2)
Follow rest of the process from steps in this article
Some advanced configurations are covered in this topic here