Before publishing a web service, you need to specify what the web service will take as an input and which output you are interested in. Assume that for our illustration, we need to predict a level of someone's income (that is, less than or equal to 50K or greater than or equal to 50K) from the input: age, education, sex, and race. You can achieve this using the Project Columns module.
In your web service, the input should go to the Score Model module. So, connect the Web service input module to the Score Model module. Add a Project Columns module and connect its input port to the output of the Score Model module. In the properties panel of the module, select the Scored Labels option only. Let's take a look at the following screenshot:
After running the experiment successfully, you can check the output of the two Project Columns modules in your scoring experiment; the output of which are as expected. Now, this experiment is ready to be published...