{ long => 'title', short => 'T', type => 'string', mandatory => 'no', default => $default, allowed => undef, disallowed => undef },
{ long => 'xlabel', short => 'X', type => 'string', mandatory => 'no', default => undef, allowed => undef, disallowed => undef },
{ long => 'ylabel', short => 'Y', type => 'string', mandatory => 'no', default => undef, allowed => undef, disallowed => undef },
{ long => 'title', short => 'T', type => 'string', mandatory => 'no', default => $default, allowed => undef, disallowed => undef },
{ long => 'xlabel', short => 'X', type => 'string', mandatory => 'no', default => undef, allowed => undef, disallowed => undef },
{ long => 'ylabel', short => 'Y', type => 'string', mandatory => 'no', default => undef, allowed => undef, disallowed => undef },