Mapper is a synchronous activity that adds a new process variable to the process. This variable can be an inline schema, primitive element, or a complex element. You can map the data values from the current list of process variables to the elements of the variable with the Mapper activity.
The Input Editor tab defines the structure of the process variable to add to the process. You can use a simple datatype, or you can define a group of data elements on this tab.
You can also reference an XML schema stored in the project. The data specified here becomes the input and output schema of the Mapper activity. This data is then available to other activities in the process.