1. F. Genova, VO as a Data Grid, 2003/06/301 Interoperability of astronomy data bases Françoise Genova, CDS

2. F. Genova, VO as a Data Grid, 2003/06/302 Astronomy A small discipline Few commercial constraints A long term partnership to define exchange standards and links FITS: early data exchange format on-line information in astronomy: from observations to results

3. F. Genova, VO as a Data Grid, 2003/06/303 An early example of interoprerability: Name resolver Object name >> position

4. F. Genova, VO as a Data Grid, 2003/06/304 Evolving world - Web Services - Very Large Surveys Simbad Name Resolver >> Sesame Web Service

5. F. Genova, VO as a Data Grid, 2003/06/305 Web Services as building blocks

6. F. Genova, VO as a Data Grid, 2003/06/306 The astronomy bibliographic network Links between –electronic journals –the ADS bibliographic database –on-line services (SIMBAD, NED) –… archival data/published results bibcodee.g. 1999A&A...351.1003G

7. F. Genova, VO as a Data Grid, 2003/06/307 References in an on-line article  links to ADS  quality check

8. F. Genova, VO as a Data Grid, 2003/06/308 ADS - Abstracts - Scanned articles - Links to original on-line paper - Links to other, distributed information e.g. original observations - Also-read articles

9. F. Genova, VO as a Data Grid, 2003/06/309 ADS From bibliography To the original observations Search an author’s publications

10. F. Genova, VO as a Data Grid, 2003/06/3010

11. F. Genova, VO as a Data Grid, 2003/06/3011

12. F. Genova, VO as a Data Grid, 2003/06/3012 HST archive From observation To publication

13. F. Genova, VO as a Data Grid, 2003/06/3013 A&A on line From publication to SIMBAD and more

14. F. Genova, VO as a Data Grid, 2003/06/3014 Simbad Information About the object

15. F. Genova, VO as a Data Grid, 2003/06/3015 Links To high energy observations in HEASARC, To Catalogues

16. F. Genova, VO as a Data Grid, 2003/06/3016 Links from object names in journals: an early example: IBVS

17. F. Genova, VO as a Data Grid, 2003/06/3017 Links to images and data

18. F. Genova, VO as a Data Grid, 2003/06/3018 GCVS

19. F. Genova, VO as a Data Grid, 2003/06/3019 Lessons learnt De facto standard SIMBAD/NED, ADS, journals, archives Cooperation between all the actors + snowball effect Journals, ADS, data centres, archive centres The community is trained (everyday tools) Easy-to-build link but contents / validation are fundamental the role of experts remains fundamental for building value-added services

20. F. Genova, VO as a Data Grid, 2003/06/3020 Data federation Tabular data in astronomy A common description for tabular data –Reference catalogues –Published tables –Surveys –Catalogues of observations in archives ReadMe physical organization  contents

21. F. Genova, VO as a Data Grid, 2003/06/3021 ReadMe

22. F. Genova, VO as a Data Grid, 2003/06/3022 Tables published in articles are usable data!

23. F. Genova, VO as a Data Grid, 2003/06/3023 Links to observational data (images, spectra, time series), often distributed in observatory archives

24. F. Genova, VO as a Data Grid, 2003/06/3024 An homogenized view of heterogeneous information With links to data

25. F. Genova, VO as a Data Grid, 2003/06/3025 Towards data integration XML VOTable > Roy’s talk

26. F. Genova, VO as a Data Grid, 2003/06/3026 HEARSARC Browse Astrores in action!

27. F. Genova, VO as a Data Grid, 2003/06/3027 With a touch of GLU Générateur de Liens Uniformes Resource dictionary (shared, distributed, hierarchical name space, clone management…), knows the query syntax Resolver: symbolic name > URL An early registry prototype with many of the required functionalities (conversions, failure tests, …)

28. F. Genova, VO as a Data Grid, 2003/06/3028 Observations from European archives Inclusive: NASA missions HST, Chandra, surveys, …

29. F. Genova, VO as a Data Grid, 2003/06/3029 Glu Tag Resolver Symbolic name >> URL

30. F. Genova, VO as a Data Grid, 2003/06/3030 Data mining: the Uniform Content Descriptors A set of UCDs has been first developed in the frame of the ESO/CDS Data Mining project to describe VizieR catalogue columns (100.000 columns, 1.300 UCDs) Name for concept Assigned semi-automatically using column label, description and unit Used e.g. to check the coherence of information in tables

31. F. Genova, VO as a Data Grid, 2003/06/3031 UCD browser

32. F. Genova, VO as a Data Grid, 2003/06/3032 UCD+units: conversion, selection Select catalogues & target Join on UCDs :

33. F. Genova, VO as a Data Grid, 2003/06/3033 Colour excess characterizes carbon stars

34. F. Genova, VO as a Data Grid, 2003/06/3034

35. F. Genova, VO as a Data Grid, 2003/06/3035 http://cdsweb.u-strasbg.fr/UCD/

36. F. Genova, VO as a Data Grid, 2003/06/3036 Extension of UCDs SDSS: 1.500 columns –Manual verification needed –Very few additional UCDs On-going: –UCDs for VOX –UCDs for IDHA data model Add ‘Metadata’ branch … FITS keywords are often not accurate

37. F. Genova, VO as a Data Grid, 2003/06/3037 Validation, maintenance A new structure Prune the existing UCD tree UCD steering group –Proposal in October 2003 –UCD V1.0 –Evolution mechanism

38. F. Genova, VO as a Data Grid, 2003/06/3038

39. F. Genova, VO as a Data Grid, 2003/06/3039 The future Other knowledge basis –List of object names –Journal keywords –Thesaurus (built by librarians)…  Astronomy described with different points of view  Converging towards an ontology of astronomy??