Introduction to Linked Open Vocabularies http://lov.okfn.org/ during EUDAT2017 https://eudat.eu/events/trainings/eudat-semantic-working-group-at-9th-rda-plenary-barcelona-3-4-april-2017

1. María Poveda Villalón, Ontology Engineering Group
Universidad Politécnica de Madrid, Spain
Pierre-Yves Vandenbussche, Fujitsu Ireland
Ghislain Atemezing, Mondeca, France
Bernard Vatant, Mondeca, France
LOV
Linked Open Vocabularies
mpoveda@fi.upm.es
@MariaPovedaV
3rd April, 2017
EUDAT, Barcelona

2. LOV – Linked Open Vocabularies
What is Linked Open Vocabularies?
2
§ Mission: promote and
facilitate the reuse of
well documented
vocabularies in the
Linked Data ecosystem
§ Vocabularies registry and
index
o http://lov.okfn.org
§ Datalift
o http://datalift.org/
§ Started at 2011
§ Hosted by OKFN

3. LOV – Linked Open Vocabularies
What do we mean by “vocabulary”?
3
Glossa
ries
Taxono
mies
Thesa
uri
…
n RDF vocabulary defined as a schema
(T-box) for the description of Linked
Data
§ Does not contain Value Sets such as
expressed in SKOS
n Designed with reuse in mind
§ Relaxation of formal constraints
n Vocabulary should refer to
and reuse relevant
existing ones

4. LOV – Linked Open Vocabularies
Features - Vocabs
4

5. LOV – Linked Open Vocabularies
Information about vocabularies
5
MetadataRelationships
Versions
Connection
with other
applications

6. LOV – Linked Open Vocabularies
Annotated in VOAF
6
http://purl.org/vocommons/voaf

7. LOV – Linked Open Vocabularies
Features – Terms
7

8. LOV – Linked Open Vocabularies
Search terms
8
Ranked
• Term appearing in
primary and secondary
annotations
• Vocabulary popularity in
LOV
• Term use in LOD
Filters

9. LOV – Linked Open Vocabularies
Features – Agents
9

10. LOV – Linked Open Vocabularies
Agents information
10
URIs
Vocabularies
Role:
Creator
Contributor
Publisher
Domains
Name
Type

11. LOV – Linked Open Vocabularies
Features – Provide data
11

12. LOV – Linked Open Vocabularies
Data & API
12
SPARQL query
Dumps

13. LOV – Linked Open Vocabularies
Features – Suggest vocabs
13

14. LOV – Linked Open Vocabularies
Suggestions & Quality checking
14
LOV curation team
LOV curation team
q Metadata: title,
description, authors,
dates, vann, version,
etc.
q Human readable:
labels and comments
q Publication
q Licence
Authors

15. LOV – Linked Open Vocabularies
Conclusions
15
LOV Community
§ Provides information
§ Metadata
§ Relationships
§ Historical
§ Agents
§ Terms search and ranking
§ Promote and facilitate reuse
§ Provide Basic Metadata:
§ Who, What, Why, When
§ Versioning information &
mechanisms
§ Provide human readable
annotations with language
information
§ Declare licence
http://www.cosasbuenas.es/blog/LOVlicenses

16. LOV – Linked Open Vocabularies
Conclusions
16
LOV Community
§ Provides information
§ Metadata
§ Relationships
§ Historical
§ Agents
§ Terms search and ranking
§ Promote and facilitate reuse
§ Leverage the Linked Data and
Web architecture
§ Available (API)
§ Provide Basic Metadata:
§ Who, What, Why, When
§ Versioning information &
mechanisms
§ Provide human readable
annotations with language
information
§ Declare licence
§ Machine & Human publication.
Dereferenceable. Synchronization
§ Make use of it!

17. LOV – Linked Open Vocabularies
Questions?
17
Vandenbussche, Pierre-Yves, Ghislain A. Atemezing, María
Poveda-Villalón, and Bernard Vatant. "Linked Open Vocabularies
(LOV): a gateway to reusable semantic vocabularies on the
Web." Semantic Web Preprint (2015): 1-16. Available at:
http://www.semantic-web-journal.net/system/files/swj1178.pdf
Thank you for your attention
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18. María Poveda Villalón, Ontology Engineering Group
Universidad Politécnica de Madrid, Spain
Pierre-Yves Vandenbussche, Fujitsu Ireland
Ghislain Atemezing, Mondeca, France
Bernard Vatant, Mondeca, France
LOV
Linked Open Vocabularies
mpoveda@fi.upm.es
@MariaPovedaV
3rd April, 2017
EUDAT, Barcelona