Understanding Data Set Designer
The Data Set Designer defines a data set as a hierarchy of strongly related records and their collective properties. In the Data Set Designer, you will build the record hierarchy structure of the data set. You can manually build the data set structure or generate the data set structure from a component. This data set is stored as the Data Set Definition.
The same data set definition must exist in any PeopleSoft database that participates in a data set copy or compare. Once the data set definition is created, you can use the project copy in Application Designer to migrate the data set definition to other PeopleSoft databases.