# old-style
Note: everthing before first left parenthesis is treated as a comment.
This domain is the rocket domain where [1] fuel is a cargo that must
be loaded into a rocket for it to run, and [2] there may be multiple
rockets. 

(operator
 LOAD
 (params
  (<object> CARGO) (<rocket> ROCKET) (<place> PLACE))
 (preconds 
  (at <rocket> <place>)  (at <object> <place>))
 (effects 
  (at <rocket> <place>) (in <rocket> <object>)))

(operator
 UNLOAD
 (params
  (<object> CARGO) (<rocket> ROCKET) (<place>  PLACE))
 (preconds 
  (at <rocket> <place>)  (in <rocket> <object>))
 (effects 
  (at <rocket> <place>) (at <object> <place>)))

(operator
 MOVE
 (params
  (<rocket> ROCKET) (<fuel> FUEL) (<place1> PLACE) (<place2> PLACE))
 (preconds (in <rocket> <fuel>) (at <rocket> <place1>))
 (effects  (at <rocket> <place2>)))