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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/
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