EMC ini file questions.

Hi, Does anyone have definite explanations these items under the
axis setup sections:
[AXIS_0]
..
HOME = 0.000
MAX_VELOCITY = 1.2 ??????????????
BACKLASH = 0.000
BIAS = 0.000
MAX_ERROR = 0.000
DEADBAND = 0.000
CYCLE_TIME = 0.001000
..

And under the section[TRAJ] just above the Axis setup, how do these
interact with smae items defined in each of the [AXIS-..] sections:

; Trajectory planner section ------------------------------
[TRAJ]

AXES = 3
COORDINATES = X Y Z
HOME = 0 0 0
;LINEAR_UNITS = 0.03937007874016
LINEAR_UNITS = 1.0
ANGULAR_UNITS = 1.0
; CYCLE_TIME = 0.025
CYCLE_TIME = 0.025
DEFAULT_VELOCITY = 2 ???????????????????
MAX_VELOCITY = 3.0 ?????????????????
;1.3
DEFAULT_ACCELERATION = 0 ???????????????????
MAX_ACCELERATION = 0 ???????????????????
;1.3
;PROBE_INDEX = 0
;PROBE_POLARITY = 1

; Axes sections ----------