The Input transformation is a passive transformation that you use to configure the data that you want to pass into a mapplet. Use an Input transformation when you want a mapplet to receive data from an upstream transformation in a mapping or mapplet.
Add input fields to define the data fields that you want to pass into the mapplet from the upstream transformation.
You can add multiple Input transformations to a mapplet. Each Input transformation in a mapplet becomes an input group in when you use the mapplet in a Mapplet transformation. You must connect at least one input group to an upstream transformation.
You can use an Input transformation in a mapplet, but not in a mapping.