sig
val std_open_file : string -> IO.input
exception File_empty
val open_file : string -> IO.input
val open_ch : Stdlib.in_channel -> IO.input
val close_ch : IO.input -> unit
val parse_uri :
string ->
Url.filetypes *
(string option * string option * string option * string option * string) *
string option
val guess_format : string list list -> Url.filetypes
end