A cleanse asset is composed of instances and steps. An instance identifies the input fields on which you can perform cleanse and merge operations. A step is a discrete cleanse operation that you define for an input.

You define one or more cleanse steps for the input fields that an instance identifies. The input fields that you add to an instance and the steps that you define for the input fields depend on your business requirements and the content of your data. You can add one or more input fields to an instance.