Time - (Duration|Elapsed Time)


A duration is the period of time between two event occurrences, computed as the difference of the time coordinates of those events.

A duration is a amount of time that may be expressed in term of unit of time

  • in a day-based fashion (ie 2 days 3 hour ..)
  • or in a time-based fashion, such as 45.7 seconds.

Elapsed time (wall clock) is a duration needed to perform a task.


A duration may be negative because of the leap second

Documentation / Reference

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