Time
Table of Contents
About
This section is about time (as time that occurs against a timeline)
It's a coordinate that orders the occurrence of events.
- A time on a timeline is called an instant
- A amount of time is called a duration or period.
Every event occurrence can be given a time coordinate value and, based on this, can be said to be:
- before,
- after
- or at the same time
as another event occurrence.
- Years do not have a constant number of days (nor do months)
- date1-date2 is a NUMBER
- timestamp1-timestamp2 is an INTERVAL which is handy for elapsed times
- Time does not only moves forward in computer. See for instance, Time - Leap Second
- If you search the time serie section, it has its own: Time Series (Collection of time data)
Documentation / Reference
- Unified Modeling Language (UML) - 2.5.1 - chapter 8.4
