You can search for identifiers within the package.
in-package search v0.2.0
module R : sig ... end
val parse : R.t -> (string * string) list
val parse_file : string -> (string * string) list
type picture = {
picture_type : int;
picture_mime : string;
picture_description : string;
picture_width : int;
picture_height : int;
picture_bpp : int;
picture_colors : int;
picture_data : string;
}
val parse_picture : string -> picture