Slots on this class:
A timepoint is a point in real, historical time (on earth).
It is independent of observer and context. A timepoint is not
a measurement of time, nor is it a specification of time.
It is the point in time. The timepoints at which events occur can
be known with various degrees of precision and approximation,
but conceptually timepoints are point-like and not interval-like.
That is, it doesn't make sense to talk about what happens during
a timepoint, or how long the timepoint lasts.
- Subclass-Of: Biblio-thing