VOCatalog presentation desired? (Was: Re: Prospective agenda for VOQL session in Madrid
thomas at astro.umd.edu
Thu Sep 22 07:34:16 PDT 2005
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.
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
> 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
| Dr. Brian Thomas
| Dept of Astronomy
| University of Maryland-College Park
| Phone: (301) 405-2312
| Fax: (301) 314-9067
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