On Thu, 4 Jan 2007, Michael Deckers wrote:
>
>    This leads me to my question: would it be helpful for POSIX implementors
>    if each and every UTC timestamp came with the corresponding value of DTAI
>    attached (instead of DUT1)? Would this even obviate the need for a leap
>    seconds table?

No, because you need to be able to manipulate representations of times
other than the present, so you need a full leap second table. You might as
well distribute it with the time zone database because both are used by
the same component of the system and the leap second table changes more
slowly than the time zone database.

You don't need to transmit TAI-UTC with every timestamp: for example, NTP
and GPS transmit UTC offset tables and updates comparatively infrequently.

Tony.
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