Datalink

[François Bonnarel]

Hi Petr


Le 12/10/2019 à 01:14, Petr Skoda a écrit :
>
>> The term timeseries would not be enough by itself to know what the 
>> content of datalink is since it could be light curves (tabular data), 
>> images or spectra. These are the most common cases, and I would like 
>> to propose a common usage, e.g.:
>>
>> timeseries-lightcurve
>> timeseries-radialvelocities
>> timeseries-spectra
>> timeseries-images
>
> timeseries of images is in fact what we are presenting in our model in 
> Fig.~13 - to every point of a light curve is associated the link to 
> original image (here we were thinking about placing the provenenace )
>
> so the time series of images is just a normal time series (where 
> another "axis" paralel with e.g. flux is an axis of mappings (links to 
> images)
>
> As I have shown in Sydney 2015, the SPLAT , TOPCAT and ALADIN 
> understand this well and (Fig.15 in a note) displays the image. We can 
> even support cutouts ...

But the point raised by Ada was not to address the case where you want 
to modelize this but more simply the case where you want to attach a 
timeSeries dataset to a source in a catalog (GAIA use case)
USING DAtaLInk

Indeed, this is a vocabulary evolution problem. There is a proposal to 
extend DataLink vocabulary (semantics field) see 
(https://wiki.ivoa.net/twiki/bin/view/IVOA/UpdateDatalinkTerms)


We should extend this  a little bit in the direction proposed by Ada

Semantics working group will manage the procedure.

Cheers
François
>
>
>
>
>>
>> Opinions or comments? Does this make sense to you?
>>
>> Ada
>>
>
> *************************************************************************
> *  Petr Skoda                         Tel   : (323) 649201, l. 361      *
> *  Stelarni oddeleni                          (323) 620361              *
> *  Astronomicky ustav AVCR, v.v.i     Fax   : (323) 620250              *
> *  251 65 Ondrejov                    e-mail: skoda at sunstel.asu.cas.cz  *
> *  Ceska republika                                                      *
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