DBpedia Japanese is one of the international chapters of DBpedia that provides linked data from the Japanese Wikipedia. It was first published in 2012 and is hosted by LODAC. The dataset is extracted from Japanese Wikipedia using the DBpedia Extraction Framework. Mappings are defined between Wikipedia infobox templates and DBpedia ontology properties to structure the data as RDF. Activities are held to improve coverage of the Japanese Wikipedia and mappings. The SPARQL endpoint and linked data are available to support various use cases.

1. DBpedia Japanese
Fumihiro Kato
ROIS & LODI
2015-10-11
6th OpenGLAM JAPAN Symposium

2. DBpedia
• Project: Research and Community
• Dataset: RDF and Ontology
• Service: Linked Data and SPARQL
2

3. Project

4. DBpedia Project
• since 2007
• current status
• datasets: in 125 languages
• committers: almost in Europe
• Github: https://github.com/dbpedia
• ML: http://sourceforge.net/p/dbpedia/
mailman/
4

5. DBpedia i18n chapters
• subdomain to host Linked data and SPARQL
services for each language
• http://xx.dbpedia.org
• 18 languages
• hosted by volunteers
• original datasets or datasets generated by
a host
5

6. DBpedia Japanese
• One of i18n chapters
• Hub of resources in Japanese
• Promotion of LOD to Japanese communities
• Hosted by LODAC
• http://ja.dbpedia.org
6

7. History
• 9 May 2012 Published the 1st version
• 30 Jun. 2012 Published the 1st IRI version
• [ Occasional updates ]
• 17 Jun. 2013 Added links to Japanese Wikipedia
Ontology and WordNet-ja
• 14 Jan. 2015 Published the latest version
• 8 Jul. 2015 Added links to J-GLOBAL knowledge
• 9 Oct. 2015 Added links to Geonames.jp (NEW!)
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8. Dataset

9. DIEF: DBpedia Information Extraction Framework
• Software to extract datasets from dumps of
Wikipedia and other Wikimedia projects
• with language-specific extractors and parsers
https://github.com/dbpedia/extraction-framework
9

10. Infobox extraction
Templates
used
in
a
entry
DBpedia
ontology
mappings
Extraction
Mappings
are
used
during
an
extraction
process
10

11. DBpedia全体の処理
ref:
D.
Kontokostas
et
al.
"Internationalization
of
Linked
Data.
The
case
of
the
Greek
DBpedia
edition."
Journal
of
Web
Semantics:
Science,
Services
and
Agents
on
the
World
Wide
Web,
vol.
15,
No.3,
Sep.
2012,
pp.51-­‐61
11

12. dbp-­‐owl:AdministraSveRegion
dbp:サイボーグ009
dbp-­‐owl:
ComicsCreator
dbp:宮城県
dbp:石ノ森章太郎
rdfs:label
rdf:type
rdfs:label
dbp-­‐prop:生年
dbp-­‐owl:notableWork
dbp-­‐owl:award
dbp-­‐owl:birthPlace
rdf:type
サイボーグ009
宮城県 foaf:Person
1938
石ノ森章太郎
rdf:type
rdfs:label
dbp:村井嘉浩
dbp-­‐owl:leaderName
Graph example
dbp:手塚治虫
文化賞
dbp-­‐owl:Cartoon
rdf:type
12

13. http://mappings.dbpedia.org/index.php/Mapping_ja13

14. 14

15. http://mappings.dbpedia.org/server/statistics/ja/15

16. 16

17. {{TemplateMapping
|
mapToClass
=
ComicsCreator
|
mappings
=
{{PropertyMapping
|
templateProperty
=
名前 |
ontologyProperty
=
foaf:name
}}
{{PropertyMapping
|
templateProperty
=
本名 |
ontologyProperty
=
foaf:name
}}
{{PropertyMapping
|
templateProperty
=
生年 |
ontologyProperty
=
birthYear
}}
{{PropertyMapping
|
templateProperty
=
生地 |
ontologyProperty
=
birthPlace
}}
{{PropertyMapping
|
templateProperty
=
没年 |
ontologyProperty
=
deathYear
}}
{{PropertyMapping
|
templateProperty
=
没地 |
ontologyProperty
=
deathPlace
}}
{{PropertyMapping
|
templateProperty
=
国籍 |
ontologyProperty
=
nationality
}}
{{PropertyMapping
|
templateProperty
=
受賞 |
ontologyProperty
=
award
}}
{{PropertyMapping
|
templateProperty
=
公式サイト |
ontologyProperty
=
foaf:homepage
}}
{{PropertyMapping
|
templateProperty
=
画像 |
ontologyProperty
=
foaf:depiction
}}
{{PropertyMapping
|
templateProperty
=
ジャンル |
ontologyProperty
=
genre
}}
{{PropertyMapping
|
templateProperty
=
画像サイズ |
ontologyProperty
=
imageSize
}}
{{PropertyMapping
|
templateProperty
=
職業 |
ontologyProperty
=
occupation
}}
{{PropertyMapping
|
templateProperty
=
代表作 |
ontologyProperty
=
notableWork
}}
}}
17

18. 18

19. 19

20. Activities to grow datasets
• “Mapping party” for DBpedia mappings
• “Wikipedia Town” for Wikipedia entries
20

21. Service

22. http://wiki.dbpedia.org/about/about-dbpedia/architecture
22

23. dbpedia-vad-i18n
• Virtuoso module to publish DBpedia as LD
• forked for DBpedia Japanese
• feedback to the upstream
https://github.com/dbpedia/dbpedia-vad-i18n
https://github.com/fumi/dbpedia-vad-i18n23

24. DBpedia Live version
• Trial services in English and German
• to update immediately when a Wikipedia
entry is updated
• useful for Wikipedia Town for instance
• Issues
• hard to set up
• less triples than the usual version (?)
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25. Use cases

26. http://linkedopendata.jp/?p=48626

27. 27

28. Japanese SPARQL Book
• Examples use DBpedia and DBpedia Japanese
• Coming soon! You must buy!
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