Re: Dates: explicit fields and missing values

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From: Michael Lake (mikel_at_speleonics.com.au)
Date: Sun Feb 18 2001 - 05:14:25 CET 

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Date: Sun, 18 Feb 2001 15:14:25 +1100
From: Michael Lake <mikel_at_speleonics.com.au>
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Subject: Re: Dates: explicit fields and missing values
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Paul & Eleanor wrote:
> to his own format. Month followed by day is the American format (but
> Anyway, You should be able to detect a non-conforming format quick
> enough as soon as someone surveys on a day of the month past the
> 12th. :-)

Yes if its written as 14-12-2001 we know that it must be dd-mm-yyyy but

Date: 07-11-2001

7th day of November or the 11th day of July?

You cannot detect a non-conforming format all of the time.
QED. :-)

Conclusion: we have to split the dd, mm and yyyy into either attributes
of a date element or split then into individual elements. I'd go for
attributes.

<DATES><surveyDate year="1974" />
       <creationDate year="1998" month="01" day="10" />
       <modificationDate year="1999" month="06" day="22" />
</DATES>

Mike 

-- 
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Michael Lake
Active caver, Linux enthusiast and interested in anything technical.
Safety Convenor, Australian Speleological Federation
Owner, Speleonics (Australia)
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