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Re: limits of the generic

• To: "Dare Obasanjo" <dareo@m...>
• Subject: Re: limits of the generic
• From: Jeni Tennison <jeni@j...>
• Date: Sun, 29 Sep 2002 11:31:46 +0100
• Cc: "John Cowan" <jcowan@r...>, xml-dev@l...
• In-reply-to: <8BD7226E07DDFF49AF5EF4030ACE0B7E07A972B4@r...>
• Organization: Jeni Tennison Consulting Ltd
• References: <8BD7226E07DDFF49AF5EF4030ACE0B7E07A972B4@r...>
• Reply-to: Jeni Tennison <jeni@j...>

Hi Dare,

>> The algorithm in the W3C XML Schema Datatypes Recommendation adds
>> the year/month component first (which would give 2005-02-29), then
>> "pins" the result of that to give a legal date (i.e. 2005-02-28),
>> and then adds the day and time components of the duration (to give
>> the final answer of 2005-03-01).
>
> Which Astonishes me (as in Principle of Least Astonishment). I would
> have expected a year after 2-29 to be 3-1.
>
> Did I misread John's email? 2005-03-01 is 3-1 isn't it? 

Yes, but he said he would have expected *[one] year* after 2-29 to be
3-1, i.e. for 2004-02-29 + P1Y to be 2005-03-01. Whereas the W3C XML
Schema Rec. algorithm says that 2004-02-29 + P1Y is 2005-02-28.

Cheers,

Jeni

---
Jeni Tennison
http://www.jenitennison.com/

• References:
  • RE: limits of the generic
    • From: "Dare Obasanjo" <dareo@m...>

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