When you define a relational structure of input ports, the Unstructured Data transformation generates XML to pass to a
service. To increase performance, enable the PowerCenter Integration Service to flush XML to the Unstructured Data transformation. When you enable input flushing, the PowerCenter Integration Service flushes XML from each group after it receives all the data for the root value. For example, you have an employee group and an employee address group. The PowerCenter Integration Service can flush data from both groups to the Unstructured Data transformation each time a different employee occurs in the data. You must sort the data in each group by the primary key of the root group. You can join groups in the pipeline if a group does not have the same key.