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Using LOD to crowdsource Dutch WW2
underground newspapers on Wikipedia
Olaf Janssen, National Library of the Netherlands
Digital Cultural Heritage, Berlin, 30-08-2017
olaf.janssen@kb.nl - @ookgezellig - slideshare.net/OlafJanssenNL
http://www.4en5meiamsterdam.nl/attachment/47454
During WW2
the Dutch resistance issued many
underground newspapers.
In every shape & form…
http://www.4en5meiamsterdam.nl/attachment/47454
http://resolver.kb.nl/resolve?urn=ddd:010436323 http://resolver.kb.nl/resolve?urn=ddd:010442948
http://resolver.kb.nl/resolve?urn=ddd:010447825 http://resolver.kb.nl/resolve?urn=ddd:010450508
From well-organized,
‘professional’
big titles…
(o.a. Parool, Vrij Nederland, Trouw, de Waarheid)
…to very small, amateur, home-made,
pamphlet-like issues
After the war 1.300 newspaper titles
were collected & preserved at the NIOD …
https://commons.wikimedia.org/wiki/File:Verzetskrant_in_archiefdozen_bij_het_NIOD.jpg – CC-BY-SA - OlafJanssen
The national Institute for
War, Holocaust
and Genocide Studies
in Amsterdam
http://opac-gonext.oclc.org:8180/DB=8/XMLPRS=Y/PPN?PPN=107123223
.. and were
described in formal library catalogues
(1.300 titles)
Bibliographic
metadata
Underground
students’ newspaper
from The Hague
In 2010 these WW2 newspapers were digitized…..
www.delpher.nl/kranten
…into
full-texts in Delpher …
(1.300 titles)
The Dutch national aggregator for historic full-texts
• Newspapers
• Books
• Magazines
In Delpher you can read and word-search
these newspapers…
But say, I want to know more about this newspaper
• What sort of illegal newspaper was it?
• What is the history of this newspaper?
• Who wrote it?
• Where was this newspaper printed?
• How was it distributed?
• Were there any relations with other underground newspapers?
• Etc…
But say, I want to know more about this newspaper
• What sort of illegal newspaper was it?
• What is the history of this newspaper?
• Who wrote it?
• Where was this newspaper printed?
• How was it distributed?
• Were there any relations with other underground newspapers or
resistance groups?
• Etc…
But say, I want to know more about this newspaper
• What sort of illegal newspaper was it?
• What is the history of this newspaper?
• Who wrote it?
• Where was this newspaper printed?
• How was it distributed?
• Were there any relations with other underground newspapers?
• Etc…
You can’t answer these
questions from Delpher
Big drawback of Delpher:
No contextual information
about WW2 underground newspapers
https://thejungleisneutral.files.wordpress.com/2013/11/lost.jpg
Where would many people go to find
contextual information about historic newspapers?
Probably Wikipedia (via Google)
Where would many people go to find
contextual information about historic newspapers?
Probably Wikipedia (via Google)
http://nl.wikipedia.org/wiki/De_Geus_onder_studenten_(verzetsblad)
Where would many people go to find
contextual information about historic newspapers?
Probably Wikipedia (via Google)
http://2.bp.blogspot.com/_BWzuYwiS6-I/TMgeRsFd3mI/AAAAAAAAElw/3cvgbZSPWcs/s1600/doctor+macro+judy+scared.jpg
http://2.bp.blogspot.com/_BWzuYwiS6-I/TMgeRsFd3mI/AAAAAAAAElw/3cvgbZSPWcs/s1600/doctor+macro+judy+scared.jpg
http://2.bp.blogspot.com/_BWzuYwiS6-I/TMgeRsFd3mI/AAAAAAAAElw/3cvgbZSPWcs/s1600/doctor+macro+judy+scared.jpg
Information on Dutch underground newspapers was
distributed across multiple, unconnected sources
1. Descriptions (metadata in library catalogue, 1.300 titles)
2. Content (full-text in Delpher, 1.300 titles)
3. Context (in Wikipedia…. at least... )
http://2.bp.blogspot.com/_BWzuYwiS6-I/TMgeRsFd3mI/AAAAAAAAElw/3cvgbZSPWcs/s1600/doctor+macro+judy+scared.jpg
Information on Dutch underground newspapers was
distributed across multiple, unconnected sources
1. Descriptions (metadata in library catalogue, 1.300 titles)
2. Content (full-text in Delpher, 1.300 titles)
3. Context (in Wikipedia…. at least... )
http://2.bp.blogspot.com/_BWzuYwiS6-I/TMgeRsFd3mI/AAAAAAAAElw/3cvgbZSPWcs/s1600/doctor+macro+judy+scared.jpg
Information on Dutch underground newspapers was
distributed across multiple, unconnected sources
1. Descriptions (metadata in library catalogue, 1.300 titles)
2. Content (full-text in Delpher, 1.300 titles)
3. Context (in Wikipedia…. at least... )
http://2.bp.blogspot.com/_BWzuYwiS6-I/TMgeRsFd3mI/AAAAAAAAElw/3cvgbZSPWcs/s1600/doctor+macro+judy+scared.jpg
Information on Dutch underground newspapers was
distributed across multiple, unconnected sources
1. Descriptions (metadata in library catalogue, 1.300 titles)
2. Content (full-text in Delpher, 1.300 titles)
3. Context (in Wikipedia…. at least... )
Using LOD to crowdsource Dutch WW2 underground newspapers on Wikipedia - DCH, 30-08-2017, Berlin, Germany
This Wikipedia article is
a carefully chosen exception
1. Very few illegal newspapers had
their own WP articles
2. The inventory of these newspapers
on WP:NL was far from complete
<<< 1.300
titles
We tackled both problems!
Wikiproject
“Systematically and uniformly describe
all 1.300 Dutch underground newspapers from WW2
on Wikipedia”
tinyurl.com/verzetskranten
Wikiproject
“Systematically and uniformly describe
all 1.300 Dutch underground newspapers from WW2
on Wikipedia”
tinyurl.com/verzetskranten
Reach big audiences
https://thejungleisneutral.files.wordpress.com/2013/11/lost.jpg
We badly needed contextual information about
the newspapers. Where did we get it?
De Ondergrondse Pers 1940-1945
Lydia E. Winkel, H. de Vries , 1989
This paper book
contains entries about
all 1.300
illegal newspapers
Entry 199 – De Geus; (onder studenten)
Unique ID
(within the book)
Place of publication
Newspaper Place name
Context
Raw material for
Wikipedia article!
Person names
Newspaper Persons
IDs of related students’
newspapers
This newspaper Other newspapers
We OCRed this book into PDF
+ put it online under CC-BY-SA
http://www.niod.nl/nl/de-ondergrondse-pers-1940-1945 (PDF)
We OCRed this book into PDF
(CC-BY-SA)
http://www.niod.nl/nl/de-ondergrondse-pers-1940-1945 (PDF)
Available online (PDF, flat file)
Open license (CC-BY-SA)
Convert PDF into structured database.
Link titles to places, persons, other titles
Link titles to KB-catalogue (metadata) and
Delpher (full-text)
Link titles, persons and places to external
sources
We OCRed this book into PDF
(CC-BY-SA)
http://www.niod.nl/nl/de-ondergrondse-pers-1940-1945 (PDF)
Available online (PDF, flat file)
Open license (CC-BY-SA)
Convert PDF into structured database.
Link titles to places, persons, other titles
Link titles to KB-catalogue (metadata) and
Delpher (full-text)
Link titles, persons and places to external
sources
We OCRed this book into PDF
(CC-BY-SA)
http://www.niod.nl/nl/de-ondergrondse-pers-1940-1945 (PDF)
Available online (PDF, flat file)
Open license (CC-BY-SA)
---------------------------------------------------
Convert PDF into structured database
Link: titles  places, persons, other titles
Link titles to KB-catalogue (metadata) and
Delpher (full-text)
Link titles, persons and places to external
sources
We OCRed this book into PDF
(CC-BY-SA)
http://www.niod.nl/nl/de-ondergrondse-pers-1940-1945 (PDF)
Available online (PDF, flat file)
Open license (CC-BY-SA)
---------------------------------------------------
Convert PDF into structured database
Link: titles  places, persons, other titles
Link: titles  library catalogue (metadata)
and Delpher (full-text)
Link titles, persons and places to external
sources
We OCRed this book into PDF
(CC-BY-SA)
http://www.niod.nl/nl/de-ondergrondse-pers-1940-1945 (PDF)
Available online (PDF, flat file)
Open license (CC-BY-SA)
---------------------------------------------------
Convert PDF into structured database.
Link: titles  places, persons, other titles
Link: titles  library catalogue (metadata)
and Delpher (full-text)
Link: titles, persons and places  external
sources
Convert PDF into structured database.
Link: titles  places, persons, other titles
Link: titles  library catalogue (metadata)
and Delpher (full-text)
Link: titles, persons and places  external
sources
LOD & database expert
Gerard Kuys
Convert PDF into structured database.
Link: titles  places, persons, other titles
Link: titles  library catalogue (metadata)
and Delpher (full-text)
Link: titles, persons and places  external
sources
VIAF
Using LOD to crowdsource Dutch WW2 underground newspapers on Wikipedia - DCH, 30-08-2017, Berlin, Germany
Available online (PDF, flat file)
Open license (CC-BY-SA)
---------------------------------------------------
Convert PDF into structured database.
Link: titles  places, persons, other titles
Link: titles  library catalogue (metadata)
and Delpher (full-text)
Link: titles, persons and places external
sources
Summer 2016
This LOD database is unique in the Netherlands.
First time data about underground newspapers was
systematically collected and linked online!
https://www.pinterest.com/freethewronged/world-war-ii/
Wikiproject
“Systematically and uniformly describe
all 1.300 Dutch underground newspapers from WW2
on Wikipedia”
We have: LOD database
Using an article template we generated
1.300 uniform and interlinked Wikipedia stubs
https://c1.staticflickr.com/9/8281/7699231918_11a7356c38_b.jpg
https://nl.wikipedia.org/wiki/De_Geus_onder_studenten_(verzetsblad)
Grey = Wikipedia article stub
Automatically generated from database
using the article template
https://nl.wikipedia.org/wiki/De_Geus_onder_studenten_(verzetsblad)
Non-grey = Wikipedia article stub
Automatically generated from database
using the article template
This bit
was added manually
to expand stub into full article
 Crowdsourcing by
Dutch Wikipedia community
https://nl.wikipedia.org/wiki/De_Geus_onder_studenten_(verzetsblad)
Wikipedia volunteers are expanding the
1.300 stubs…
gradually creating more and more full articles.
Door Sebastiaan ter Burg [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons
Before the project
The number of articles is
growing steadily…
… making Dutch people
wiser and happier!
http://www.formerdays.com/2011/05/dutch-liberation.html
Vielen Dank!
olaf.janssen@kb.nl - @ookgezellig
tinyurl.com/verzetskranten

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