Expressing 2- and 3-D coordinates

[Arnold Rots]

Hm.  Frankly, it should not be taken as an excuse to rip 2-D and 3-D
coordinates apart.  One needs to characterize the vector, not the
vector components.

Francois Bonnarel wrote:
> Hi all,
>   I didn't take part to the discussion last week (starting reading it when it
> was nearly over - typical time scale problem for me ;-) ), but I am
> strongly in favor of Arnold's compromise. For me the point is
> not only that lists are presently not supported but that spatial
> coordinates play really a slightly different role. (at least in the
> case of RA and DEC, mais be different for a X,Y,Z frame for interplanetary
> medium description) . Building the Characterization model which maakes reuse of STC
> components we faced this list syntax problems monthes ago to build our 
> utypes and I was in favor of this splitting out. I am glad to see that
> VOEvent people have shared the same concerns, and I would like to thank 
> Armold for the effort. By the Way I have nothing using lists in XML in general
> of course, as was allready pointed out by other people even VOTable allows arrays
> of values...
> 
> Best regards to all
> François
> 
> >From: Rob Seaman <seaman at noao.edu>
> >Subject: Re: Expressing 2- and 3-D coordinates
> >Date: Mon, 19 Dec 2005 16:55:38 -0700
> >To: dm at ivoa.net
> >X-Scanned-By: MIMEDefang 2.35
> >
> >On Dec 19, 2005, at 2:27 PM, Arnold Rots wrote:
> >
> >< STC for the time being converts to enumerating the vector  
> >< components as in my first message, and may change back to list  
> >< types when list support is firmly there.  [...[  The STC schemata  
> >< will be adapted accordingly.
> >
> >That seems like a good compromise to me.  The question remains  
> >whether there is a consensus from all parties in support of this.   
> >This isn't the best time of year to promote efficient communication,  
> >but folks should comment if they are either in strong support or  
> >strong disagreement.  Those who are in the fuzzy middle are either  
> >more interested in seeing a consensus than in what that consensus  
> >might be (like me) - or else simply don't care much either way.
> >
> >Thanks to Arnold for remaining flexible and patient.
> >
> >Rob
> >
> 
> =====================================================================
> Francois   Bonnarel               Observatoire Astronomique de Strasbourg
> CDS (Centre de donnees          11, rue de l'Universite
> astronomiques de Strasbourg)    F--67000 Strasbourg (France)
> 
> Tel: +33-(0)3 90 24 24 11       WWW: http://cdsweb.u-strasbg.fr/people/fb.html
> Fax: +33-(0)3 90 24 24 25       E-mail: bonnarel at astro.u-strasbg.fr
> ---------------------------------------------------------------------
> 
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Arnold H. Rots                                Chandra X-ray Science Center
Smithsonian Astrophysical Observatory                tel:  +1 617 496 7701
60 Garden Street, MS 67                              fax:  +1 617 495 7356
Cambridge, MA 02138                             arots at head.cfa.harvard.edu
USA                                     http://hea-www.harvard.edu/~arots/
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