[whatwg] HTML5 Definition of week (section 188.8.131.52)
singer at apple.com
Mon Jul 20 10:45:51 PDT 2009
At 10:45 +0000 19/07/09, Ian Hickson wrote:
>On Fri, 3 Jul 2009, SJ Kissane wrote:
>> I am concerned by the wording of this section. There are different
>> systems of week number -- as far as I can work out, this is the same as
>> ISO 8601 week numbering. But it nowhere explicitly says that.
>> I think, the spec should have a normative reference to ISO 8601 for the
>> definition of week numbering. Then, if the spec wants to give an
>> informative recap of what ISO 8601 says, for the benefit of those who
>> don't have a copy (especially since it isn't free), that's fine. But I'm
>> worried, by inserting some complicated definition into the spec, does it
>> match exactly ISO 8601's definition? (I'm sure it does, but "are the
>> definitions the same?" is not immediately obvious from inspection.)
>They are not the same. ISO8601 doesn't define how you parse a week string,
>how you handle errors in such a string, and so forth. The numbers are
>compatible, and a valid HTML5 week string is an ISO8601 week string
>(though I don't know if the opposite is the case), but that's about it.
>While we could have an non-normative reference, in practice, it wouldn't
>add much, since (a) the HTML5 spec defines everything you might get from
>ISO8601, and (b) we don't want to have implementors think "oh, it's the
>same as ISO8601, I'll just use an ISO8601 date library", since such a
>library might get the parsing details wrong in terms of what HTML5 says.
an informative note to that effect might be a good idea.
>Ian Hickson U+1047E )\._.,--....,'``. fL
>http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
>Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
Multimedia Standards, Apple Inc.
More information about the whatwg