By the way Bryain
"The actual practitioners don't seem to get a look in."
While I have litle time for many scholars, particularly the desk-bound ones, the definition emerged around the time the BBC were going out recording 'the actual practitioners
The Library of Congress in the States has many thousands of recorded examples of 'the actual practitioners' at work
Just as Sharp's 'Some Conclusions' was based on observation of the real thing taking place, the same goes for the definition makers at Sao Paolo
It is not a perfect definition by any means - it does need updating or even replacing - but not by a diminishing few folkies pushing a personal agenda.
Jim Carroll