[whatwg] [wf2] Late comments and questions on Web Forms 2.0

Ian Hickson ian at hixie.ch
Tue Aug 15 03:28:28 PDT 2006

On Tue, 15 Aug 2006, Christoph Päper wrote:
> *Henri Sivonen*:
> > 2.4.
> > Does ISO 8601 define how its flavor of the Gregorian calendar rolls
> > backwards all the way to, say, 1900 or 1 AD?
> By default ISO 8601 uses the proleptic Gregorian calendar, i.e. there are no
> null days somewhere---depending on country---between 1582 and 1926, and it
> uses a year 0000, like astronomers but unlike historians do.
> The standard says, however, that the notation can also be used with different
> conventions like the common Julian-Gregorian mix, if the communicating
> partners have a prior agreement on one. I don't recall whether RFC 3339 says
> something on this point, the W3C Note <http://www.w3.org/TR/NOTE-datetime> is
> quiet on it, but XML Schema <http://www.w3.org/TR/xmlschema-2/#dateTime> does
> not use a year 0000 *yet*, but seems to use the Gregorian calendar
> prolepticly.

Henri said to use the proleptic Gregorian calendar too. I went with that.

> > 2.4.
> > Is it conforming to have leading zeros in a year that fills four digit
> > slots? E.g. 00002006-03-08T00:00:00Z
> Any year number with not exactly four digits should only be allowed, when
> preceded by a plus or minus sign.

Since only positive dates are allowed, that solves that problem.

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'

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