Fwd: VOEvent session

[Roy Williams]

>  Concern was expressed about
>> simpleTimeSeries in VOEvent 2.0, particularly by Mireille. One
>> development this IVOA is that a time series data model will be
>> defined by Naples Interop and so why is VOEvent developing its own.

There is an alternate representation of time series in the VOEvent2 
standard, through the simple Table element. This is based loosely on the 
VOTable structure, adds only 5 elements to the structure, and can be 
used for any kind of table. But specifically, it could be used for a 
time series. From Doug Tody's recent document on representing time 
series, I have taken some utypees, 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>