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Sigma KEE - TimePoint

时点

这是通用时间轴上无法延伸的的一点。我们在不同程度的准确和近似值上，可以知道 Process 发生的 TimePoint，但是 TimePoint 在概念上是成点状而非间隔状，也就是说，说 TimePoint 持续了多长是没有意义的。

Relationships
Parents	时间位置	Any TimePoint or TimeInterval along the universal timeline from NegativeInfinity to PositiveInfinity.
Children	时代	An instant in time that is arbitrarily selected as a point of reference.
	Midnight
	Noon	The Class of all TimePoints that are at noon.