The options are either switches, or have a string or integer argument.
The verbosity option is an example of a
switch: it can be given as --verbose
to make
the program verbose, or --noverbose
to make
it quiet.
Some options take suboptions. For example, the
--obsdata
option might be given as
where the comma-separated list of suboptions is given as the--obsdata=ra=12:34:56,dec=-10:0:0
--obsdata
option argument.There are no optional arguments: if an option is documented as having an argument (that is, if it is not a switch), an argument must be provided. The defaults documented below apply only if the option is not supplied.