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Re: Picking up the ball

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Matt Sergeant
January 10, 2003 06:30
Re: Picking up the ball
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On Fri, 10 Jan 2003, John Peacock wrote:

> Rich Bowen wrote:
> > I like ICal. But let's make sure that Tai is not the better way to go before
> > we hack something onto an IETF (or whoever it is) standard.
> As much as I like DJ Bernstein's coding style (the author of libtai), it is
> unlikely that TAI64 will be appropriate for our use, since it is also based on
> the Olson libraries epoch of 1970-01-01 00:00:10 TAI.
> I would prefer a structured variable; separate values for each period of
> importace.  Since some people have explicitly mentioned wanting to handle deep
> prehistory, the thought of subtracting attosecond precision over a range of
> billions of years just scares me!  Of course, Math::BigInt could handle it...

IIRC tai uses negative values to support times earlier than this epoch. I
think it goes back to before the birth date of the earth (though that
might not be long enough for some ;-))

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