Re: IVOA Note on UCD maintenance

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
>
>
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ESA 
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