But nonetheless, the idea of a universally accepted set of definitions isn't a bad one, and since presumably Irish Tempest is revising or relating to JSP318 (which certainly when I used it used to have a few ambiguities in it such as the wonderful statement
"FTEs are not aircrew, but are part of the aircraft operating crew" which I never did quite get my head around) he's in the loop of D/Flying(PE), CTP(BDN), etc.
Out of interest I took at look at
JAR-1 , which is the JAA definitions document. Not one of the terms above is even alluded to, which can only be described as unhelpful.
Maybe this is a task for SETP/SFTE/RAeS/AIAA between them?
G