An empirical analysis of the edits performed in the DBpedia Mappings Wiki. (http://mappings.dbpedia.org)

1. A Closer Look at the Changing Dynamics of
DBpedia Mappings
Dr.-Ing. Maribel Acosta
14th DBpedia Community Meeting, Karlsruhe, Germany

2. Motivation: Collaborative Crowdsourcing
2
F. Flöck, M. Acosta:
WikiWho: precise and efficient attribution of authorship of revisioned content. WWW 2014.

3. Motivation: Collaborative Crowdsourcing
3
https://www.wikiwho.net
German Wikipedia article à Autoren (bottom of the page) à wikiwho

4. Approach
4

5. 5

6. Data Collection Pipeline
Get Mapping
Namespaces
Get Mapping
Id per
Namespace
Get Mapping
Metadata
6
http://mappings.dbpedia.org/api.php
{'action': 'query',
'meta': 'siteinfo',
'siprop': 'namespaces'}
{'action': 'query',
'list': 'allpages',
'apnamespace': %ns%,
'apcontinue' : %cont%}
{'action': 'query',
'pageids‘: %pageid%,
'prop': 'revisions',
'rvlimit': 'max',
'continue': %cont%,
'rvprop': 'timestamp|user|userid'}

7. Overview of the Results
Total number of mappings: 6,374
Total number of edits: 28,664
Total number of contributors: 283
7
As of 11. August 2019

8. Mappings per DBpedia Chapter
• Coverage of DBpedia mappings with respect to Wikipedia properties
8

9. Mappings per DBpedia Chapter
9
• Chapters with high number of mappings (>400): English, Dutch, Serbian
1
1
1
1

10. Edits over Time
• Freshness of the Wiki
• Maintenance effort
10

11. Edits over Time: DBpedia Chapters (en, de)
11
• (en) Most of the edits were performed when the chapter was created
• (de) Peaks of edits in 2011, 2014, 2015 (mostly about places)
1
2 2 2
1
2

12. Edits over Time: All DBpedia Chapters
12
1 1
1
2
1
• Most of the edits were performed when the chapter was created
• Edits decreased considerably (in all chapters). Convergence?
1
2

13. Edits per DBpedia Mapping
• Correctness / quality of individual mappings (?)
13

14. Edits per DBpedia Mapping
14
Mapping en:Infobox officeholder
Mapping ja:声優
Mapping el:Κουτί πληροφοριών εκλογών
Mapping sv:Geobox
• Ukranian Chapter presents the highest median (over 10 edits per mapping)
• 75th Percentile (Q3) is lower than 10 in most chapters
1
1

15. Contributors per DBpedia Chapter
• Completeness of mappings
• Mapping coverage of DBpedia chapters
15

16. Contributors per DBpedia Chapter
16
1
1
1
• Chapters with high number of contributors: English, Portuguese, German, Greek
• No significant correlation between # contributors and # mappings (p=-0.08, p-value=0.56)
1
1

17. Co-editing Network of DBpedia
17
• Editors contributing to the same mappings
• Editors across several DBpedia Chapters

18. 18
PT
EL
EN
ES
JA
NL
FR

19. Outlook
19

20. Future Work
• Analyze the edits of the ontology namespaces and compare them with
the mapping edits
• Incorporating into the analysis other collaborative platforms used in the
development of DBpedia, e.g., GitHub
• Identify the type of edit actions – content creation, deletion, correction –
in DBpedia mappings (WikiWho)
• Create the interaction network to understand the collaborative process of
creating the DBpedia mappings (WhoVis)
20

21. 21
WhoVis
Fabian Flöck, Maribel Acosta: whoVIS: Visualizing Editor Interactions and Dynamics in Collaborative Writing
Over Time. WWW (Companion Volume) 2015

22. Data & Results
22
https://github.com/maribelacosta/dbpedia-analysis

23. A Closer Look at the Changing Dynamics of
DBpedia Mappings