Consensus

[Arnold Rots]

Roy,

This is a totally inadequate format since it carries no metadata
whatsoever. This leads us back to pre-VO days where no one bothered to
include complete metadata, because, after all, all friends and buddies
knew exactly what was meant - or so one pretended.

I suppose I can point to stcTab.xsd till I am blue in the face and
still have no one take this stuff seriously.

I also proposed a compromise last spring that I would have been
willing to defend as IVOA-compliant, but there did not seem to be any
interest in that, either.

  - Arnold


Roy Williams wrote:
[ Charset ISO-8859-1 unsupported, converting... ]
> 
> > IVOA is now defining a common understanding of TimeSeries, why should
> > this differ from the VOEvent version of the same data-type?
> 
> 
> Mike.... Not sure if my earlier message made it, so I will repeat it. I 
> think the time series below is not very different from the iVOA common 
> understanding ...Roy
> 
> -----------------------------
> 
> There is an alternate representation of time series in the VOEvent2 
> standard, through the Table element, which is based loosely on the 
> VOTable structure. But specifically, it could be used for a time series. 
>  From Doug Tody's recent document on representing time series, I have 
> taken some utypes, and come up with the following very simple timeseries 
> that can be used in VOEvent2 (below).
> 
> Cheers
> Roy
> 
> 
> <Param name="zeropoint"
>         utype="CoordSys.TimeFrame.Zero"
>         value="51234.0"/>
> <Param name="band"
>         utype="CoordSys.Band.GenID"
>         value="R"/>
> <Param name="timeunit"
>         utype="Char.TimeAxis.Unit"
>         value="day"/>
> <Table>
>    <Field name="Time"
>           utype="Char.TimeAxis.Coverage.Location.Value"
>           unit="day"
>           ucd="time.epoch"/>
>    <Field name="Rmag"
>           utype="Data.FluxAxis.Value"
>           unit="mag"
>           ucd="phot.mag;em.opt.R"/>
>    <Data>
>      <TR><TD>1.635</TD><TD>16.78</TD></TR>
>      <TR><TD>1.934</TD><TD>15.87</TD></TR>
>      <TR><TD>3.456</TD><TD>14.99</TD></TR>
>    </Data>
> </Table>
> 
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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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