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Unique Key
The Unique Key dialog helps you to specify a unique key to ensure there are no duplicated records in the real time chart or library component. This dialog appears when you select the Incremental Fetch button in the Real-time Settings dialog or select 
beside the Unique Key text box in the Auto Refresh dialog.
Resources
Lists all the elements in the business view used by the real time chart or library component.
Adds the selected fields to the Unique Key box.
Removes the selected fields from the Unique Key box if they are not required.
Unique Key
Lists the fields you have added as the unique key, which is used to guarantee there are no two records with the same unique key value in the real time chart or library component.
OK
Closes this dialog and applies the unique key to the real time chart or library component.
Cancel
Cancels specifying the unique key and closes this dialog.
Displays the help document about this feature.
Ignores the setting and closes this dialog.