You can transform relational data to hierarchical data. To transform input groups into hierarchal data, map nodes from group of relational ports to the hierarchical ports. You can pass the data from the hierarchical output ports to another transformation in the mapping.
You can return relational output from the Data Processor transformation. If a component returns relational data, you create groups of output ports by mapping nodes from the hierarchical input to groups of relational ports. You can pass the data from the relational output ports to another transformation in a mapping.