I suppose it started with the Monroe doctrine, or maybe the John Smith one, but suddenly in the last two decades what was a handy icon has become a media substitute for examining the specific situation and its specific characteristics.
So the Powell Doctrine: Don't attack unless you have overwhelming force. Or Desider's doctrine in So you want to be a millionaire Libyan: Don't try to assist a revolution unless the rebels have shown that they can hold a lot of the country.
Both perfectly reasonable BTW.
Until they become doctrines.