You can search for identifiers within the package.
in-package search v0.2.0
type t
val empty : t
val add : t -> t -> t
val sub : t -> t -> t
val opp : t -> t
val compare : t -> t -> int
val equal : t -> t -> bool
val make : int -> int -> int -> t
val lmake : ?year:int -> ?month:int -> ?day:int -> unit -> t
val year : int -> t
val month : int -> t
val week : int -> t
val day : int -> t
exception Not_computable
val nb_days : t -> int
val ymd : t -> int * int * int