a notification message receiver mechanism configured to receive a notification message sent from {HEAD ~ said notification mechanism}; {TAIL ~ said notification message} providing notice that an information file sufficiently changed; said notification message initiated by one who maintains said information file; and 
a notification message receiver mechanism configured to receive a notification message sent from { HEAD ~ said notification mechanism } ; { TAIL ~ said notification message } providing notice that an information file sufficiently changed ; said notification message initiated by one who maintains said information file ; and
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