Online Documentation for Data Pump for PostgreSQL
Selecting driver
On this step of the wizard you are to select a driver for which you are adding a data source.
Choose the driver for which you are adding a data source. For example, PostgreSQL ANSI driver if you want to connect to the PostgreSQL server.
Any drivers that are installed on your machine are showed in the list.
Click the Next button to proceed to the Finish step of the wizard.