When you deploy an application, the Data Integration Service runs application objects.

You can add parameter sets to applications that you deploy. A parameter set is an object in the Model repository that contains parameters and parameter values to use with mappings and workflows. Deploy a parameter set with the workflow or mapping to use the parameter values when the Data Integration Service runs the workflow or mapping. You can add multiple parameter sets to an application and then use different parameter sets for mapping or workflow runs.

When you deploy a full application of the same name to the same Data Integration Service, the Data Integration Service overwrites the deployed application and all of the objects in the application.