Data Models in Kyoto

Mon Apr 18 16:31:21 PDT 2005

Dear data modellers
   In the included mail from Jonathan, J refers to a recent traffic on
characterization. Most of this traffic has not been directly pposted on
the dm-list actually. So In agreement with J., Mireille Louys and I
gathered documents to show the current status of the Charac subgroup
work for everybody:
    First, characterization is a child of the so called "Observation"
data model. A note written last year on that topic can be found at
http://alinda.u-strasbg.fr/Model/Characterisation/characterizationMir0405.pdf
At the same address http://alinda.u-strasbg.fr/Model/Characterisation
you can find:
    The characterisation predraft in a first version by Mireille Louys
and me (characterization.pdf or characterization.ps)
    The Model and UML diagrams under DM/
    The Xml schema char032005.xsd
    A document written by Brian Thomas on a possible convergence
of Characterization, STC and Quantity data models: VOmodel_merger.pdf
    A document proposing a list of Utypes for Characterisation proposed
by Alberto Micol:
    Characterisation_UTYPES_v0.2.pdf
   All these documents are there to show the status of present discussions
Best regards
F Bonnarel

<From owner-dm at eso.org  Thu Apr 14 03:55:29 2005
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<From: Jonathan McDowell <jcm at head.cfa.harvard.edu>
<Date: Wed, 13 Apr 2005 22:02:30 -0400 (EDT)
<To: dm at ivoa.net
<Subject: Data Models in Kyoto
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<
<Hello Data Model Group,
<
<It's time to plan activities for Kyoto (actually it's well past time,
<but I just got to it now). 
<
<We have at least the following things to discuss
<  Spectrum/SED  
<  Characterization
<    (including STC/Quantity merger, 3D IFU discussion, UTYPES, Theory)
<  STC (now at Proposed Rec)
<  Catalog
<  Quantity
<
<I know that Rots (STC), Micol (Char UTYPEs), Osuna (Catalogs), me/Tody
<(SSAP/SED), Bonnarel/Louys (Characterization), Igor (Char 3D) will all
<be there, so we have a pretty good collection except for Brian - you're
<not coming, B? Maybe you can give me a few pages to present on 
<your package and how it differs from the CDS scheme.
<
<We have three DM sessions scheduled
<of two hours each and I propose 
< Tues  pm  DAL/DM joint session (SSAP/SED)
< Thurs pm  Characterization and related issues     Clashes with Registry, Grid-Web
< Fri   am  STC, and Catalog/Quantity               Clashes with UCD, Grid-Web
<
<I'm hoping we can move the Fri session to Wed. so I can attend the UCD
<session.
<
<I solicit presentations on all these topics, and suggestions for
<other topics to be covered.
<
<
<Characterization:
<
<I've been catching up somewhat on the recent traffic on
<Characterization, and would like to congratulate all concerned on the
<recent work which is now at the level of detail we need. Both the CDS
<and Maryland approaches to Characterization look promising, but I
<haven't managed to internalize them at the level of detail needed to
<compare and contrast. So I'd ask both groups to look at the others' work
<and comment on differences and similarities. One issue that does need to
<be addressed, as Alberto mentioned in his work on UTYPES (which I liked
<very much), is whether we cut the problem as
<
< Char/TypeOfCharacterization/CharacterizationAxis 
<               e.g.  Char/Bounds/Spatial, Char/Location/Temporal
<or
< Char/CharacterizationAxis/TypeOfCharacterization 
<               e.g.  Char/Spatial/Bounds, Char/Temporal/Bounds
<
<Now the CDS takes the second approach, except that the Location uses
<STCAstroCoords which I had understood to be something that includes all
<axes, i.e. the first approach... so I worry there is an inconsistency
<here.
<
<Looking forward to seeing many of you in Kyoto
<
< - Jonathan
<

=====================================================================
Francois   Bonnarel               Observatoire Astronomique de Strasbourg
CDS (Centre de donnees          11, rue de l'Universite
astronomiques de Strasbourg)    F--67000 Strasbourg (France)

Tel: +33-(0)3 90 24 24 11       WWW: http://cdsweb.u-strasbg.fr/people/fb.html
Fax: +33-(0)3 90 24 24 25       E-mail: bonnarel at astro.u-strasbg.fr
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