So for example on the attached flight there are:
Paid buckets:
J9, C9, D9, Z9, P9=At least 9 seats in these paid business buckets.
Y9, B9, M9, E9, U9, H9, Q9, V9=At least 9 seats in these paid coach buckets.
W0, S0, T0, L0, K0, G0, N0=No seats in these paid coach buckets.
Award/Upgrade buckets:
X0=No coach saver award seats for non-elites.
XN0=No coach saver award seats for elites or cardholders.
I9=At least 9 business saver award seats for non-elites.
IN9=At least 9 business saver award seats for Platinum, 1K, or GS elites.
HN9=At least 9 coach standard award seats.
ZN9=At least 9 business standard award seats.
YN9=At least 9 coach standard elite/cardholder award seats.
JN9=At least 9 business standard elite/cardholders award seats.
R9=At least 9 seats upgradable to business using any upgrade instrument by non-elites.
RN9=At least 9 seats upgradable to business using any upgrade instrument by elites.
PN9=Not applicable as far as I know on BF flights?