Wikidata is Wikipedia's sister database project, which is a large multilingual knowledge base that anyone can edit. It contains over 24 million data entities and 150,000 contributors. Data is stored per entity as property-value assignments, and can have annotations and references. Wikidata serves as a cultural heritage information hub, containing data on over 700,000 entities with heritage status. It has strong connections to Wikipedias, cultural heritage databases, and external data sources. New users are encouraged to connect their data to Wikidata by joining ongoing integration projects, donating data, and finding ways to exploit Wikidata content and infrastructure.

1. Markus Krötzsch: Wikidata Toolkit Kic
koff
Wikidata as a
Cultural Heritage
Information Hub
Markus Krötzsch
Knowledge-Based Systems
TU Dresden
Europeana AGM
November 2016
© Wikipedia user Hajotthu, 1994, CC-BY-SA 3.0
All slides CC-BY 3.0, except those requiring CC-BY-SA 3.0

2. What is
?

3. “It's big!”
“It's important!”
What is
?

4. “It's big!”
“It's important!”
“We should use it more.”
What is
?

5. “It's big!”
“It's important!”
“We should use it more.”
“Actually, I haven't really
looked into it.”
What is
?

6. “It's big!”
“It's important!”
“We should use it more.”
“Actually, I haven't really
looked into it.”
“To be honest, I have no idea about this
thing. Maybe wait till others use it …”
What is
?

7. What is
?
Wikipedia's
database sister
A large
multi-lingual
community site
The free
knowledge base
anyone can edit

8. >24,000,000data entities
>150,000contributors with at least one edit

9. Data Format
● Stored per entity
● Property-value
assignments

10. Data Format
● Stored per entity
● Property-value
assignments
creator Raphael

11. Data Format
● Stored per entity
● Property-value
assignments
inventory number Gal.-Nr. 93
collection
● Assignment may
have annotations
and references
Gemäldegalerie
Alte Meister

12. Data Format
● Stored per entity
● Property-value
assignments
material used oil paint
canvas
● Assignment may
have annotations
and references
● User-defined
vocabulary
backgroundapplies to part

13. >120,000,000statements, about 50% sourced
>2,800distinct properties

14. 189,929visual artworks, including 154,212 paintings
© Bernardo Bellotto, 1748, public domain

15. 28,798monuments
14,163sculptures
© Wikipedia user X-Weinzar, 2008, CC-BY-SA 2.5 © Wikipedia user Brunswyk, 2005, CC-BY-SA 3.0

16. 703,126entities with a heritage status,
almost 130,000 with start time
© Rene Schwietzke, 2004, CC-BY 2.0

17. 49,122musical compositions, including 4,337 operas
© Antonio Vivaldi, violin concerto Gßmajor RV 314, digitized by SLUB Dresden

18. as an
information hub
50,777,678 links to
291Wikipedias
767,361 links to 66
cultural heritage
identification sites
24,561,400 links to
1,326 external DBs

19. Top 20 cultural heritage identifiers
(without 396,778 National Heritage List for England numbers)

20. >1,500 museums with artworks on Wikidata

21. How is all this
data used then?
● InWikipedia
● In external apps
● In research

23. Understanding
Wikidata Queries
More than
30,000,000
queries asked
in Sept 2016
● About 10% from
human users
● 2500 queries used
“Europeana ID”
● More research
needed …

24. “It's big!”
“It's important!”
“We should use it more.”
What is
?
“But how?”

25. Step 1:
Connect
● Join ongoing data
integration projects
● Crowdsource, e.g.,
using Mix'n'Match
AlignWikidata
with your data

26. Step 2:
Share
● Donate your data
toWikidata
● Integrate with and
compare toWikidata
Exchange data

27. Step 3:
Exploit
● Create new services
onWikidata content
and infrastructure
● Enjoy more links to
your content from
other services
Take advantage of
your integrated data

28. Step 0:
Ask
● Wikidata wiki &
email list (community)
● Wikimedia Germany
(development)
● Wikimedia Found.
(operations)
Get in touch with
the right people

29. “It's big!”
“It's important!”
“We should use it more.”
What is
?
“Let's get
started!”
Markus Krötzsch,TU Dresden