You can search for identifiers within the package.
in-package search v0.2.0
type 'a t = 'a -> string
val int : int t
val bool : bool t
val float : float t
val char : char t
val string : string t
val option : 'a t -> 'a option t
val pair : 'a t -> 'b t -> ('a * 'b) t
val triple : 'a t -> 'b t -> 'c t -> ('a * 'b * 'c) t
val quad : 'a t -> 'b t -> 'c t -> 'd t -> ('a * 'b * 'c * 'd) t
val list : 'a t -> 'a list t
val array : 'a t -> 'a array t
val comap : ('a -> 'b) -> 'b t -> 'a t