This Web

Baltimore Interop 

---

WebHome 
WebChanges 
WebTopicList 
WebStatistics

All Webs

Astrodata
IVOA
Know
Sandbox
TWiki
Trash

---

TWiki intro
TWiki tutorial
User registration
Notify me

W/I Groups

Data Access
Data Model
GWS
Query Language
Registry
Stds&Procs
Semantics
VOEvent
VOTable

---

Applications
Astro-RG
Data Curation
Theory

ivoa.net

www.ivoa.net
Doc. Repository
Events
Projects
XML Schema

IVOA Data Model

! Work in progress : Site under re construction !!!

Recommended	Ongoing	To come		Ongoing and/or shared building blocks
STC	ObservationProvenanceDataModel	PhotometryDataModel		UnitsDesc
CharacterisationDataModel	SpectralLinesDM			Utypes
Spectrum	SimulationDataModel			Serialisation

This is a collaborative page of the IVOA data modelling standardization working group.

To join see our page on How to participate

Contents

Introduction

Definition: The role of the Data Modeling group is to provide a framework for the description of metadata attached to observed or simulated data.
The activity of the Data Model WG activity focuses on logical relationships between these metadata, examines how an astronomer wants to retrieve, process and interpret astronomical data, and provides an architecture to handle them. What is defined in this WG can then be re-used in the protocols defined by the DAL WG or in VO aware applications .

Work Packages

We currently have 5 different work packages, with one clearly identified as a transverse effort with the Theory IG : the Simulation Data Model

Work Package	Definition	Main page
STC	Space Time Coordinates	STC
Spectrum	Spectrum Data Model	Spectrum
Characterisation	Characterisation Metadata for Observations	CharacterisationDataModel
AMLine	Atomic and Molecular Line Data Model	SpectralLinesDM
Photometry	Photometry Data Model	PhotometryDataModel
Observation/Provenance	Observation concept and instrumental Provenance	ObservationProvenanceDataModel
SimDB	Simulation Data Model	Simulation Data Model

Added to that, this group handles questions that are general for the IVOA and shared with other working groups.

	Work Package	Definition	Main page	WG partners
	Units	Units definitions and Syntax rules	UnitsDesc	VOtable,Theory,VOQL,...
	Utypes construction	Definition and syntax for Utypes to map a piece of metadata with its role in a Data model	Utypes	VOTable,VOQL

Participants

Membership of this working group is informal as people and projects come and go. See above for information on "how to join" the working group. The list of members is just a start, feel free to add your name below if you wish to be informed and interact with us.

Projects

Virtual Observatory Projects working on Data models and their implementations should list themselves here. * to fill and update***

• ObservatoireStrasbourg
  • SAADA

• CDS
  1. Aladin portal
  2. CAMEA, an interactive tool for Characterisation metadata publishing
  3. Aspid-SR

Design and Modeling

Strategy, uses-cases ....

Specifications

Adopted standards

• Space Time Coordinates Description
• Characterisation DM
• Spectrum Data Model

Latest Documents

IVOA Proposed Recommendation

STC (A. Rots, editor)

Various metadata modeling efforts

Latest Externally Release Documents and Schemas:

• Recommendation:
• Proposed Recommendation:
• Working Draft

Implementations

Meetings

Most of our face-to-face activity takes place during IVOA Interoperabiltiy Meetings. Follow the Data Model Page links to locate agendas, presentation slides, and action items.

Interop	Main page	Data Model page
Trieste, Italy (19-23 May 2008)	InterOpMay2008	InterOpMay2008DataModels
Cambridge, UK (27-28 Sep 2007)	InterOpSep2007	InterOpSep2007DataModel
Beijing, China (14-18 May 2006)	InterOpMay2007	InterOpMay2007DataModel
Moscow, Russia (18-21 Sep 2006)	InterOpSep2006	InterOpSep2006DM
Victoria, Canada (14-19 May 2006)	InterOpMay2006	InterOpMay2006DataModel
Madrid, Spain (6-7 Oct 2005)	InterOpOct2005	InterOpOct2005DataModel
Kyoto, Japan (16-20 May 2005)	InterOpMay2005	InterOpMay2005DataModel
Pune, India (27-29 Sept 2004)	InterOpSep2004	InterOpSep2004DataModel
Cambridge, Mass. USA (23-28 May 2004)	InterOpMay2004	InterOpMay2004DataModel
Strasbourg (16-17 Oct 2003)	InterOpOct2003	InterOpOct2003Registry
Cambridge, UK (12-16 May 2003)	InterOpMay2003	InterOpMay2003DataModel

Involved People

Name	Country	Organization	Role
Jonathan McDowell	USA	CfA, Boston
Francois Bonnarel	France	CDS Strasbourg
Igor Chilingarian	France	Paris Observatory
Marie Lise Dubernet	France	Paris Observatory
Mireille Louys	France	CDS/LSIIT Strasbourg	Chair
Gerard Lemson	Germany	MPI Garching
Alberto Micol	Spain	European Space Agency / ESAC
Nicolas Moreau	France	Paris Observatory
Pedro Osuna	Spain	European Space Agency / ESAC
ArnoldRots	USA	CfA, Boston
Anita Richards	UK	Jodrell Bank	Vice Chair
Jesus Salgado	Spain	European Space Agency / ESAC
J.D. Santander-Vela	Spain	Instituto de Astrofísica de Andalucía / CSIC

Please put your name here if you wish ...

Ongoing work

• Use cases
• Science Requirements and Use Cases for the Data Model

• Data Model For Atomic and Molecular Lines
• Source Data Model^?
• Observation/Provenance DM

A recap of previous work can be found here

• Former Data Modeling Efforts^?

WG Roadmap

• Roadmap for 2007-2008
• Report to IVOA Exec FM9, Jan 2004

Meetings

Links to last interop meetings pages.

• IVOA in Beijing InterOpMay2007DataModel
• IVOA in Moscow InterOpSep2006DM
• IVOA in Madrid InterOpOct2005DataModel

Meetings Presentations&Minutes

• Check the above Interop pages for most recent meetings
• Cambridge, MA, USA, May 24-28, 2004: DM sessions presentations & details
• ESO/Garching, Jan 2004: Data Model Technical Meeting 4 Draft 0.1 of Observation model
• Baltimore, Dec 2003: Data Model Technical Meeting 3 (no minutes yet; see draft 0.2 of Quantity)
• Strasbourg 2003 Oct 14/15: Data Model WG Sessions presentations & details
• Cambridge 2003 May 13: Data Model WG Sessions presentations & details
• ESO/Garching on Jan. 23/24, 2003: Data Model Sessions minutes (WG creation and planning)
• Cambridge MA, Oct 2002: Data Model Technical Meeting 1 presentations & minutes

Standards approved^?

STC

Lastest version RFC period ended May , 2007
TCG review before July 10, 2007.
[[IVOA.STCMetadataRFC] [RFC page]].

Spectrum Data Model

RFC period ended, June 07
TCG review before July 10. Adopted in Sep 07

Characterisation DM

RFC period closed July 4th 07, but comments still welcome.
Recommended in Sept 2007

Mailing-list

• General working-group discussion takes place here on the datamodel mailing list. .

Drafts of IVOA Documents

• Gerard Lemson has provided an overall domain model for astronomy: Domain Model v0.9.1 (.doc) - Rough and incomplete first draft
• Quantity model current drafts (.ps, .pdf)
• Quantity model serialization examples (.html)
• Observation model current drafts (.ps, .pdf)

Related Documents and links: former documents versions and attempts

• 2004 Linear STC: linear (command line) implementation of STC (v1.2).

• 2002 IDHA Data Model for Astronomical Images: modeling of the acquisition process and data products

• 2005 Characterisation_Note_20051129.pdf: Characterization DM draft Note

• spec96d.pdf: Spectrum DM version 0.96 latest (Victoria)

• spec97d.pdf: Alternative Spectrum DM with STC

• SourceDM_Moscow_2006.pdf: Source Catalog Data Model Moscow Sept 2006

• CharacterisationWDversion1.0.pdf: Characterisation Data Model

• update of CharacterisationIvoadraft-v1.1.pdf: Characterisation Model Working draft version 1.1

• ivoa_char_2d_image_tutorial_1.0.pdf: User's guide for Characterisation DM by Alberto Micol

• CharacterisationImplementationv1.1.pdf: Implementations of the Characterisation DM v1.1