Knowledge Systems Laboratory, Stanford University
6
Location of Time Points
uFunction Location-Of
„Amount of time from “point zero” to the time-point
„Value is a time quantity (i.e., a duration)
„Point zero assumed to be midnight Jan 1, 1900
>Midnight-January-1-1900
> Instance-Of: Time-Point
> Location-Of: Time-Instant
>Time-Instant
> Instance-Of: Time-Quantity
>(=>  (Time-Unit ?u)  (Quantity-Magnitude Time-Instant ?u 0))