I Agree with GUEST PRS,.when I think there is a grey area,I USE THE PRS DEFINITION, so the Mistletoe bough[ThomasBayley1884]Is not[Daisy Daisy]Harry Dacre 1892 is not SweetTHAMES [EWANMACCOLL]is not, My old Kentucky Home[S fOSTER] is not,God save the Queen is not, Yesterday is not.Fiddlers green [ Connolly]is not, Sailortown FoxSMITH/Miles[ [tune]is not.      Songs from broadsheets are, because although they were composed, the authorship is lost.
It is important, so that authors or their descendants get their due royalties. No one will be saying in a hundred years that any of the BEATLES SONGS ARE TRADITIONAL[ because their descendants are not going to let large revenue slip away].I giveyou me all my love, may be a traditional style song but it WONT be traditional .Dick Miles