From MorphOS Library
MorphOS Shell commands follows a syntax defined by a template. To display the template type a '?' after the command name.
SYS:> AddDataTypes ? FILES/M,QUIET/S,REFRESH/S:
Pressing [?] will display a description of all parameters, if available. Pressing [return] will then execute the command if no arguments are required. You may also enter the some arguments with their keyword and press [return]
The arguments are separated with a comma, followed by a '/' and a capital letter which represents the type of the argument:
/A: The argument is always required. /K: The option's keyword is required if the argument is given. /S: The option works as a switch. The name of the option must be entered to specify it. Most options are switches. /N: The argument is numeric. /M: Multiple items are accepted for this argument. Although there is no limit to the number of possible arguments, they must be provided before the next argument or option. /F: The string must be the final argument on the command line; the remainder of the command line is taken as the desired string.