XPA version: 2.1.15
exposure:	exposure on/off [time]
file:	file basename
filter:	filter number
instrument:	instrument name
interrupt:	interrupt
mode:	mode single/focus/multi
multicount:	multicount number
number:	image number
process:	process on/off
region:	region on/off [ds9/clear/select x y w h]
relay:	relay mask time
status:	on/off
target:	target name
telescope:	telescope  name
temperature:	temperature setpoint
type:	type light/dark/bias/flat