[ Re: Vocabularising dataproduct_type] an attempt for definitions for catalog and source list

[Baptiste Cecconi]

In VESPA/EPNcore, we use the Catalog term with a similar definition, but with a wider scope when it comes to the set of individual objects the catalog is related to. Any type of target (planet, moon, asteroid, sample…), location on target, events. 

By the way, our equivalent of Measurement would be Catalog Item. This means that the primary information is in the current record (i.e., in the current row for a TAP service), instead of relating to an remote URL for the information (i.e. through an access_url column for a TAP service). 

Baptiste

> Le 24 mars 2020 à 11:06, Mireille LOUYS <mireille.louys at unistra.fr> a écrit :
> 
> hi all, 
> here is my suggestion for the term catalog as it has been used so far in the VO
> 
> catalog:
> a set of physical quantities recorded from an observing/simulation process and measured/computed for a set of individual astronomical objects (sources).
> Each catalog entry corresponds to one individual source object. 
> The usual representation is a table with columns figuring the quantities and rows representing an entry.
> 
> source list:
> 
> a catalog where entries are derived from one or a restricted set or data products : single image, multiband image, radio or hyperspectral cube, eventlist for instance. 
> Typically, ObsTAP can handle source list as dataproducts, with coverage inherited from the progenitor dataset.
> 
> On the contrary very large catalogs like survey, hips catalogs with coverage='allsky' are managed within archives/datacenters and searched on with keywords from the astronomical semantics, like type of objects, regime, instrument types, survey name, etc.
> 
> Here is an interface example: http://cdsarc.unistra.fr/viz-bin/cat <http://cdsarc.unistra.fr/viz-bin/cat>
> Are there server applications distributing such all sky catalogs with Obscore as one single dataproduct? 
> best , Mireille
> -- 
> --
> Mireille Louys,  MCF (Associate Professor)  
> CDS				IPSEO, Images, Laboratoire Icube 
> Observatoire de Strasbourg	Telecom Physique Strasbourg
> 11 rue de l'Université		300, Bd Sebastien Brandt CS 10413
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