When you bind the fields in a form design to a data source, you create an association between the form design and the data source that allows you to capture, present, move, process, output, and print information associated with the form design.
If you or your administrator installed the samples that come with LiveCycle Designer ES, locate the schema named Purchase Order.xsd and click Open.
Livecycle data view Connecting to a data source
The Data View palette displays a hierarchy view of each data source. The top node in the hierarchy represents the data connection and displays the name that you assigned when you created the connection.

Connecting to a data source