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DATETIME  March 2011

DATETIME March 2011

Subject:

Sv: [DATETIME] Double dash

From:

Karin Bredenberg <[log in to unmask]>

Reply-To:

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

Date:

Thu, 10 Mar 2011 09:33:15 +0100

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (53 lines)

I've got work to do to change that tradition then....

Karin

>>> Ray Denenberg <[log in to unmask]> 2011-03-09 21:10 >>>
From: Karin Bredenberg
Subject: [DATETIME] Sv: Re: [DATETIME] RIS
> 
> For the double dash:
> 
> Here in Sweden its a tradition when you write an archival
description
> and are making an interval to use the double dash and even the
single
> dash is sometimes used. But when you state the normalization you use
> the slash for period.
> 
> Example one from the ead-homepage
> (http://www.loc.gov/ead/tglib/elements/unitdate.html): 
> <unitdate type="inclusive" normal="1952/1964">1952-1964</unitdate>
> 
> Example two from the swedish description
> (http://xml.ra.se/ead/ARKIS_EAD_07.pdf page 6):
> <unitdate certainty="[X]" type=”[X]”>[YYYY]--[YYYY]</unitdate>

I'm sorry but I am now convinced that we cannot adopt the double dash
form for an interval.

In general, and in the interest of moving more quickly to closure, I
would like to advance the principle that we do not adopt an alternative
form of expression simply because some other syntax uses it.

But in the case of double dash there is a much more compelling reason,
one that just occurred to me:

Double dash is used to mean something entirely different in ISO 8601. 


'--01-31' means "January 31" (year unspecified).
'--01' means "January. 
etc.

And while these features (currently 104 and 106) are on last call and
on the verge of elimination from our spec, just because we profile out
some IS0 8601 feature from, we can't simply adopt the syntax from that
feature to use with different meaning.

Bruce  - I am not sure what this implies for RIS, we need to think it
through.  The use of consecutive dashes as discussed for RIS seems
consistent with its use in 8601.

--Ray

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