On Mar 13, 2010, at 1:30 PM, Stephane Bortzmeyer wrote:
On Sat, Mar 13, 2010 at 10:06:46AM -0500,
Marshall Eubanks <tme(_at_)americafree(_dot_)tv> wrote
a message of 61 lines which said:
This follows an ISO standard, ISO 8601,
Sections 5.5 of RFC 3339 explain very well why you should not use ISO
8601 but its subset of RFC 3339.
and also happens to sort properly (in time order).
ISO 8601 does not really have this property, see section 5.1 of RFC
3339.
Why not ? The complete 5.1 from RFC 3339
5.1.
Ordering If date and time components are ordered from least precise to
most precise, then a useful property is achieved. Assuming that the
time zones of the dates and times are the same (e.g., all in UTC),
expressed using the same string (e.g., all "Z" or all "+00:00"), and
all times have the same number of fractional second digits, then the
date and time strings may be sorted as strings (e.g., using the
strcmp() function in C) and a time-ordered sequence will result. The
presence of optional punctuation would violate this characteristic.
-----
Also, note that we are talking about _dates_. While daylight savings
time may complicate time sortability, it won't affect date sortability.
Regards
Marshall
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