STMML units and date/time values

[Tim Bergsma]

If I'm following the discussion...
attributes of DataType="datetime" have DictionaryUnit="dimensionless".

If I have Year as an attribute, with DataType="integer", I guess I just
give it DictionaryUnit="number".

Tim.

Scott Chapal wrote:
> 
> Matt Jones <jones at nceas.ucsb.edu> writes:
> 
> > OK, so, the question is:
> >    What is the unit for a scalar date-time value like "2002-10-10
> > 17:34:45"? How can this unit be defined in STMML? How is this unit
> > related to the fundamental SI unit of second?
> 
> Considering the example of using SAS for date processing, the numeric
> representation for datetime is seconds (elapsed since Jan 1. 1960),
> but the presentation (expression) of that value is merely a a
> user-specified format.  It is in the 'format' that the complexity of
> the calendar is algorithmed.
> 
> I agree with Peter Murray-Rust:
> > I don't think it has units - it has a dataType of xsd:dateTime
> 
> There are no units for "2002-10-10 17:34:45", date-time
> doesn't have units.  Elasped time units are derived from seconds.
> 
> -Scott
> 
> --
> Scott E. Chapal_________________________________________________
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-- 
Tim Bergsma
LTER Information Manager
W.K. Kellogg Biological Station
Michigan State University
Hickory Corners, MI   49060
616/671-2337
tbergsma at kbs.msu.edu
http://lter.kbs.msu.edu