val read : string -> string -> (Stdlib.in_channel -> 'a) -> string -> 'aread dir suffix reader key reads information using reader. Data are supposed to reside in the files under dir directory with suffix suffix. reader takes in_channel as an argument and read data from in_channel. The key specifies key associated the value. Any characters can be used in key, since they are properly escaped. If there are no data associated to key, raise Not_found.
val write : string -> string -> (Stdlib.out_channel -> 'a -> unit) -> string -> 'a -> unitwriter dir suffix writer key data write data associated the key into the directory dir with suffix. You can use any characters in key since they are propery escaped.