module Period: sig
.. end
A period represents the time passed between two events (a date, a time...).
Only an interface defining arithmetic operations on periods is defined here.
An implementation of this interface depends on the kind of an event (see
module Time.Period
, Date.Period
and Calendar.Period
).
type
date_field = [ `Day | `Month | `Week | `Year ]
module type S = sig
.. end
Common interface for all periods.