[N]
[..]
NA
NBINTERNAL
NBLEAF
NBLEAFDBT
NEXTINDEX
NEXTKEY
NOTFUNCTION
NOVFLSIZE
NO_HEADER
NO_HIGHEST_ACTIVE_REG
NO_LOWEST_ACTIVE_REG
NPART
NRINTERNAL
NRLEAF
NRLEAFDBT
NULL
NULL_DEVICE
NUM_FAILURE_ITEMS
NUM_NONREG_ITEMS
NUM_REG_ITEMS
[..]