IVOA Note on UCD maintenance

[Pedro Osuna]

Dear Andrea,


I think the procedure is quite thorough and reflects all the steps we
suggested in the initial document on UCD.

I am worried though about allowing the identifier "ivoa:" as namespace
for those UCDs already approved but temporarily out of the UCD standard
(as this one will only be updated once or twice a year). 

What this might end up is with loads of systems using not-yet-standard
UCDs, different from one proposal to the other, and all of them starting
with the same identifier "ivoa:". Even worse, probably the data provider
will write the "ivoa:" ucd, and probably won't change it to the "real"
one when the UCD is standardised.

A possible solution for this problem would be to allow for specific
namespaces for specific needs (let's say, like a "solar:" namespace for
solar physics specific UCDs) but this again seems to go in the debate on
whether this should be relegated to data models or not, which I think is
not worth to retake now.

Just my two cents.

Cheers,
P.





On Tue, 2005-10-18 at 17:52, Andrea Preite Martinez wrote:
> Dear member,
> 
> at the recent InterOp meeting in Madrid I got the action to prepare a
> document desribing in detail the procedure to follow in order to maintain
> the standard list of UCD words.
> 
> Together with Sebastien we wrote a draft document that I uploaded in the
> IVOA document area as a Note: "Maintenance of the list of UCD words.
> Ver.1.0"
> ( http://www.ivoa.net/Documents/Notes/  ... I still don't have the link to
> the note)
> 
> Before sending it to the TCC I'd appreciate comments on the text !!
> 
> Regards
> 
> Andrea
> 
> 
> ==============================================================================
> Andrea Preite Martinez                  andrea.preitemartinez at rm.iasf.cnr.it
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-- 
Pedro Osuna Alcalaya

ESA 
Science Archives System Engineer
Science Archive Team
European Space Astronomy Centre
(ESAC/ESA)
e-mail: Pedro.Osuna at esa.int
Tel + 34 91 8131314
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