There are two methods of import:
Import an ADM XML file from the desktop
Import an ADM XML file from the Software Library
To import an ADM XML file from your desktop:
From the Actions menu, select Import, then select File from Desktop.
In the pop-up that appears, specify a name for the ADM, the source database you want to assign to the ADM, and location on your desktop from which you want to import the ADM.
Click OK.
The ADM now appears on the Application Data Models page.
To import an ADM XML file from the Software Library:
After importing an ADM, you may want to discover sensitive columns or run a verification job. In the process of performing these tasks, the PL/SQL metadata collection packages are automatically deployed on the target database. The Database user must have DBA privileges to auto-deploy the packages.