Adding input/output parameters
Use this procedure to add input/output parameters in a mapping. These parameters contain input or output arguments that you can drop on a Java function, or on a Boolean function. Boolean functions should have input parameters only.
To link an input document element to a function, or to link an output document element to a function, drag and drop the document element to the function, to create parameters. A parameter is created with the same name as the document element with a link.