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DATETIME  July 2011

DATETIME July 2011

Subject:

Re: Intervals at #004 - related to #003 and #005

From:

Ray Denenberg <[log in to unmask]>

Reply-To:

Discussion of the Developing Date/Time Standards <[log in to unmask]>

Date:

Wed, 6 Jul 2011 15:50:37 -0400

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (43 lines)

 From: Saašha Metsärantala
> - For clarity, I would suggest to split #004 into two parts: #004 for
> intervals containing "date / date" and #005 for intervals containing
> "date / period".

Ok.



>
> - In the "examples" column, all "date / date" intervals are symmetrical,
> that is with year-year, month-month or day-day precision. In the
> "rules"
> column, other constructs are described, where the year (and sometimes
> even the month) is removed. I consider that symmetry (in this context)
> has the advantage of clarity and that other constructs (if we want them)
> should be described in detail when it comes to their semantics.

Yes we had this discussion a few weeks ago and concluded that there was no need to support the asymetrical representation and that is was ambiguous anyway. I've changed this.




> - According to the "rules" column, it is not clear whether we should
> write
>
> 2011-07-01/P24M0D
>
> or
>
> 2011-07-01/P2Y0M0D
>
> which I consider could be shortened (and canonicalized) as
>
> 2011-07-01/P2Y
>
> where M's and D's are assumed to be zero when absent from such a
> context.

I don't know what these sort of normalization rules should be for duration, and I welcome comments.

--Ray

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