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Unique Key
The Unique Key dialog box is used to specify a unique key to ensure there are no duplicated records in the real time chart or library component. It appears when you select the Incremental Fetch button in the Real-time Settings dialog box or select 
beside the Unique Key text box in the Auto Refresh dialog box.
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 box and applies the unique key to the real time chart or library component.
Cancel
Cancels specifying the unique key and closes this dialog box.
Displays the help document about this feature.
Ignores the setting and closes this dialog box.