Presentation by Bob Coret, delivered at the Gaenovium conference on 7 oktober 2014.

1. Open Data in the Netherlands
- opportunities for innovation
Bob Coret
Gaenovium – 7 October 2014

2. Open data defined
- http://opendefinition.org/
Open data can be freely used, modified, and
shared by anyone for any purpose

3. The value of open data
- Neelie Kroes
Opening up data that is already collected, that
taxpayers have already paid for, is right for
transparency, and is the cheapest way we know
to unlock innovation potential. It’s the best way
we know to help Europeans create the jobs and
economic growth that we so desperately need."

4. Rijksmuseum
- the open data example in cultural heritage

5. Open data from archives
- big diversity
Contents
• Info / news
• Archive descriptions
• Meta-data of records
• Images (photo’s / maps / records)
Methods
• Download (link/e-mail/WeTransfer)
• Harvesting (OAI-PMH)
• API (REST/SPARQL)
Formats
• MS Access/Excel
• CSV, TSV
• JSON
• XML
Standards
• EAD, ESE
• OpenSearch / DublinCore
• A2A

6. Open data
- 5 stars
Tim Berners-Lee, the inventor of the Web and Linked Data initiator, suggested a 5
star deployment scheme for Open Data
http://5stardata.info/

7. Open data hurdles not technical, but between the ears
- why not?
• We already publish it on our website…
• “Our gold”
• Costs (configuration)
• Number of website visitors still important
• Fear of lack of source citation
• Quality of our data is not good enough
• Ownership of content (VOC example)
• What will happen with our data?
• Will they make money with our data?
• What’s in it for us? (more usages, more visitors, better quality)
• Role of suppliers / commercial players?

8. www.openarch.nl
- proof-of-concept / show-case / user-service

9. Supplier Source types Repository Data format Scans
Reg.archive Leiden DTB,BS,BR,NA,BB Reg.archive Leiden OAI-PMH (A2A) Reg.archive Leiden
Reg.archive Tilburg DTB,BS,BR,NA,RA,BP Reg.archive Tilburg OAI-PMH (A2A) Reg.archive Tilburg
National Archives Japanese Internment Cards National Archives CSV National Archives
National Archives East India Company (VOC) National Archives CSV -
Mun.archive Ede Gerecon. PK Mun.archive Ede CSV -
Mun.archive Ede Militia registers Mun.archive Ede CSV Militieregisters.nl
Mun.archive Schouwen-
Duiveland
Civil registry (BS)
Mun.archive Schouwen-
Duiveland
OAI-PMH (A2A)
Mun.archive Schouwen-
Duiveland
Mun.archive Enschede Civil registry (BS) Mun.archive Enschede CSV FamilySearch
SA L. Heusden Altena Population register (BR) SA L. Heusden Altena XML SA L. Heusden Altena
Mun.archive Tholen Population register (BR) Mun.archive Tholen XML Mun.archive Tholen
Mun.archive Wassenaar Church + Civil registry (BS+DTB) Mun.archive Wassenaar XML FamilySearch
IISH Residentlists RHC Eindhoven MS Access DS Eindhoven
IISH Residentlists Zeeuws Archief MS Access -
IISH Residentlists Stadsarchief Goes MS Access -
IISH Residentlists RA Tilburg MS Access -
BHIC Refugees BHIC XLS -
Jos van Rijn Civil registry (DTB) SA Rijnlands Midden XLS Nationaal Archief
Jos Glasbergen Population register (BR) Reg.archive Leiden XLS FamilySearch
Kees Kooij Civil registry (DTB) RHC Vecht en Venen XLS FamilySearch
Hogenda Civil registry (BS) Noord-Hollands Archief XLS FamilySearch
Ivo Beckers Civil registry (DTB) Reg.archive Alkmaar XLS VPND

10. Open Data coverage
- still a long way to go

11. Experimenting with rich visualizations
- from label/value to pedigree

12. Experimenting with rich visualizations
- from label/value to timeline

13. Linking records
- by phonetic search of parents or name and birthdate

14. Linking children
- By phonetic search of parents

15. Linking related persons
- but how to visualize

16. Linking online trees, biographies, online cemeteries
- by name/date

17. Linking census information
- by place/date

18. Linking the weather
- by place/date

19. Linking the map
- by street/place/date

20. Linking scans
- source of original, meta-data and scan can be different

21. Linked Open Data
– the future

22. Historical-data.org
- genealogical extensions on schema.org

23. Historical-data.org
- added microdata to HTML output

24. Spiders understand my content
- Historical Data microdata markup

25. Semantics is important
- Historical Data microdata markup

26. Open in, open out (1)
- provide API!

27. Open in, open out (2)
- provide standardized open data

28. Open data
- conclusion
• Ask for archives for open data!
• Use open data!
• Not a lot of technical problems (some effort though), a lot of opportunities:
data invites to experiments which leads to innovation
• Build beautiful, smart, handy tools or extensions!

29. Open data
- questions
• What about open data from archives in other countries?