This component is used to enable interchange of data between components when there are no mapping components (components appearing within the blocking list on APD) is present within your process definition.
When your process does not include any mapping components, then process is not capable of sharing information such as RRT values. In order to enable the process with data interchange capabilities you must include the Data Interchange component early on within the process.
Notice that this component cannot be used when other mapping components are used within the same process. For example use of Data Interchange component with MFP Component does not provide any additional capabilities since MFP component is a mapping component.
Use Data Interchange component for processes that start with Poll Directory and gain ability to interchange data between your components through this component.