Hi Patricio,
one question about the point below:
> Let me include here another element before the submission of a
> query to the resource handling catalogues: The registry.
>
> Any registry will contain metadata about the services listed, ie,
> the catalogues.
> The registry would know (among other things),
> - catalogueName (possibly catalogueUniqueID)
> - catalogueTitle
> - catalogueKeywords
> - catalogueAuthor
> - number of columns
> - number of records
> - column names, UCDs, units
> - name ID,MAIN ---
> - RA POS_EQ_RA,MAIN h:m:s
> - Dec POS_EQ_DEC,MAIN d:m:s
> ....
> - Vmag PHOT_JHN_V mag
> - Bmag PHOT_JHN_B mag
> - z REDSHIFT ---
>
are you sure the Registry will include all these information? Perhaps "column names" and "units" will be resolved by the service provider, and not by the registry itself.
Cheers,
Marco Received on 2003-05-19Z14:50:18