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Therefore strings SHOULD always contain non-whitespace content There is no specified upper limit to the size of a binary, but systems will have to impose some implementation based limit to the size they support. Seconds must be provided due to schema type constraints but may be zero-filled and may be ignored at receiver discretion. Indicates that the value is taken from a set of controlled strings defined elsewhere (see Using codes for further discussion).
This should be clearly documented, though there is no computable for this at this time An instant in time in the format YYYY-MM-DDThh:mm:zz:zz (e.g. The time SHALL specified at least to the second and SHALL include a time zone. Dates SHALL be valid dates A date, date-time or partial date (e.g. Technically, a code is restricted to a string which has at least one character and no leading or trailing whitespace, and where there is no whitespace other than single spaces in the contents Any combination of upper- or lower-case ASCII letters ('A'..'Z', and 'a'..'z', numerals ('0'..'9'), '-' and '.', with a length limit of 64 characters.
A particular problem with ISO 8601 is that it allows the century to be omitted from years, which is likely to cause trouble as we approach the year 2000.Its full reference number is ISO 8601 : 1988 (E), and its title is "Data elements and interchange formats - Information interchange - Representation of dates and times".A discussion of ISO 8601 has been written by Markus Kuhn.This profile defines two ways of handling time zone offsets: Times are expressed in local time, together with a time zone offset in hours and minutes.A time zone offset of " hh:mm" indicates that the date/time uses a local time zone which is "hh" hours and "mm" minutes ahead of UTC.