I would say use a plugboard (Preferences ==> Metadata Plugboards) but I am not sure how to do that via the calibredb command. It is possible it will make use of the plugboards you have configured in the GUI.
EDIT: Confirmed -- as I thought, "calibredb export" will use the plugboard you have configured in the GUI.
Last edited by eschwartz; 01-23-2015 at 01:45 AM.
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