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On Wed, 19 Jan 2011 08:57:46 -0700, C. M. Sperberg-McQueen wrote > On Jan 19, 2011, at 2:47 AM, Edward C. Zimmermann wrote: > > > Tossing a wacky idea into the ring... > > Why not read the semantics for T as time since 0.. > > 2011-01-17 is day precision > > 2011-01-17T01 is hour precision and means 1 AM > > 2011-01-17T01:02 is minute precision and means 1:02 AM > > This all agreed.. with this reading of T we get the T:24:00 and > > T12:60 paradigm extended to arbitary hours, minutes.. > > 2011-01-17T25 would be hour precision and 1 AM on the 18th > > basically I am thinking of allowing for simple math... this could > > be interesting for dumb clients. > > It depends, I guess, on whether you are seeking to > define a format for user input or for interchange among I see the goal as both. > parties. It's often quite useful to accept a lot of forms > in user input that one does not want in a database or > document to be stored and interchanged. Yes. > > Users may well type "19.01.2011" or "1/19/2011" or 1/19/2011 is one such.. clearly here well defined but what is 9/11/2001 ? 11 Sept or 8 Nov? And what about 10/03/15--- which can be read as 15 March 2010 or .. We are now talking about parsers and applications and in my own class I have included a large number of formats and even included the possibility to allow for inputs such as these globally ambiguous but locally understood formats.. These are part of their own standards.. I might not like them but they exist. What we are wprking on here is a new "standard" intended to enable some forms of expressions that are desired but not... > "18 Jan 2011" or "on the 19th of this month", all meaning > the same thing. But in metadata (as opposed to the > transcription of historical or legal documents), is there > an important goal to be achieved by preserving the differences > among those forms, given that (by hypothesis) they all > mean the same thing? There are some differences.. we are talking in this list about non-volatile dates but volatile dates such as today, the 19th of the current month, 2 years ago etc. are in my applications of great utility... > > -- > **************************************************************** > * C. M. Sperberg-McQueen, Black Mesa Technologies LLC > * http://www.blackmesatech.com > * http://cmsmcq.com/mib > * http://balisage.net > **************************************************************** -- Edward C. Zimmermann, NONMONOTONIC LAB http://www.nonmonotonic.net Umsatz-St-ID: DE130492967