VOCatalog presentation desired? (Was: Re: Prospective agenda for VOQL session in Madrid

[Brian Thomas]

	Pedro, All,

	Perhaps there is some confusion here. First and formost, I agree with 
	Pedro that I am not presenting any official Catalog model to the VO.

	What *I am presenting* is a possible model which answers a number
	of needs for VO query, in particular, VOQL (as defined as the query
	language that happens after ADQL). I was not presuming to detail
	the composition of the 'source' or any other astro object we may catalog, 
	but I do presume to detail some structural issues with creating a 
	queriable catalog (which is, of course, of paramount importance to 
	catalogs). Therefore, when I saw a call for some information about
	querying catalogs, I spoke up for giving a short presentation on my 
	ideas on this matter.

	I hope this clears the air.

	=b.t.

On Thursday 22 September 2005 04:13 am, Pedro Osuna wrote:
> Dear all,
> 
> I appreciate the effort that Brian is doing in defining his catalogue
> data model, but there has not been any consensus yet on the type of
> Catalogue data model that the IVOA will endorse.
> 
> As some of you -including Brian- know (from the Catalogue Data Model
> mail list) I have called for a meeting on this issue before the interop
> (in particular on monday the 5th in the afternoon)  to clarify precisely
> many of these issues. After that meeting, I planned to have small
> meetings to the chairmans of those groups with which the Catalogue DM
> might have a relation (in particular, and as reported in Kyoto, with the
> SkyNode - one of the hypothetical Catalogue DM consumers).
> 
> Therefore, you can allocate time if you want to Brian, but not to report
> on the IVOA Catalogue Data Model, which I will do in the Data Model
> session as per Jonathan's agenda.
> 
> I will be happy to re-report at the VOQL session should you consider it
> necessary.
> 
> Cheers,
> P.
> 
> 
> 
> 
> On Wed, 2005-09-21 at 14:45, Brian Thomas wrote:
> > On Wednesday 21 September 2005 03:43, Maria A. Nieto-Santisteban wrote:
> > >         * Table data model (standard column names) Where does the Catalog
> > > Data Model WG stand?
> > > 
> > 
> > 	Hi,
> > 
> > 	I am not sure that I can speak for the Catalog working group, but I can
> > 	present a VO Catalog model which has been proposed and is not (apparently)
> > 	at odds with the other models presented by the WG. 
> > 
> > 	This catalog model is built for the purposes of being queried,
> > 	holding a wide selection of the data which are present in the VO, is developed 
> > 	so that it can overlay a series of SQL tables/databases (e.g. SkyNodes 
> > 	accessed by ADQL), and can eventually be used in conjunction
> > 	with an advanced form of UCD..."UCD3". 
> > 
> > 	The query mechanism for this catalog is made in terms of "XQuery+" (an 
> > 	extended form of the standard XQuery). I can try to fit this all in to 10 min 
> > 	presentation. 
> > 
> > 	Some materials (all which is older, and not terribly organized at the moment,
> > 	and which I am in the process of updating) for this model may be found at :
> > 
> > 	http://archive.astro.umd.edu/VOCatalog
> > 
> > 	and 
> > 
> > 	http://archive.astro.umd.edu/NX_api/index.html
> > 
> > 	I shall also be presenting a poster on this work at the ADASS meeting which
> > 	proceeds the IVOA.
> > 
> > 	Thanks,
> > 
> > 	=brian

-- 
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|                                     
| Dr. Brian Thomas                    
|                                     
| Dept of Astronomy                   
| University of Maryland-College Park 
|
| Phone: (301) 405-2312               
| Fax: (301) 314-9067                 
|                                     
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