A related question:
I think it was stated, that the time will be some floating-point number.
Will its precision be predetermined or will it be system-dependent?
(Or maybe the precision is no-issue -- it could be important in comparisons, but one can argue one should always specify the smallest unit when comparing times. Only issues left are intervals; I vaguely remember something about losing precision when subtracting two close floating-point numbers.)

I ask because I stumbled across uuu time (http://www.unununium.org/articles/uuutime) when I was looking for explanation of UTC/TAI/*J*D et al. It is counted from 2000-01-01 TAI in microseconds and stored in signed 64 bit integer.



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