in reply to Re^2: Does ISO8601 require a separator in the time if one is used in the date?
in thread Does ISO8601 require a separator in the time if one is used in the date?

Yes, I've seen that. Do you have a link to the spec (see original question)? The 2000 spec was superceded by the 2004 spec which is available for purchase at https://www.iso.org/obp/ui/#iso:std:iso:8601:ed-3:v1:en. But I can not find a published version of it.

Edit: An older working doc: http://www.loc.gov/standards/datetime/iso-tc154-wg5_n0038_iso_wd_8601-1_2016-02-16.pdf. In this doc the only examples of "expanded" format datetimes have separators in both date and time. Another piece of circumstantial evidence ...


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  • Comment on Re^3: Does ISO8601 require a separator in the time if one is used in the date?

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Re^4: Does ISO8601 require a separator in the time if one is used in the date?
by Eily (Monsignor) on Mar 02, 2018 at 09:16 UTC

    Well that doc has (4.3.3), which only applies to incomplete dates (eg: no seconds):

    the expression shall either be completely in basic format, in which case the minimum number of separators necessary for the required expression is used, or completely in extended format, in which case additional separators shall be used in accordance with 4.1 and 4.2.
    4.4.4.1 also has:
    provided that the resulting expression is either consistently in basic format or consistently in extended format
    but that's for an interval, so it's mostly about having the format for the start and end (although the chosen phrasing also means consistent format within the dates). Same in 4.4.4.3 for start + duration and 4.4.4.4 for duration + end. And there's 4.4.5 which is the same as 4.3.3 for duration rather than single dates.

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