HACKATON 2011. OSLUCA

1. Linked Open Data:
an overview
Iván Ruiz Rube
Departamento de Lenguajes y Sistemas Informáticos
Universidad de Cádiz
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2. Roadmap
 Introduction
 Publishing Data
 Consuming Data
 Conclusions
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3. LINKED OPEN DATA: AN OVERVIEW
INTRODUCTION
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4. Introduction
 Huge amount of
information
 A large number of
information
systems
 Big challenges:
◦ Data integration
◦ Data analysis
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5. Need for open data
 Improvement of
organizational
transparency
 Public data
 Foster the
research
 Promote the
development of
third-party system
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6. Linked Open Data
“A method of publishing structured data so that it can be
interlinked and become more useful.
…it extends web pages to share information in a way that can
be read automatically by computers.”1
1Tim Berners-Lee 16/12/2011 Hackaton 2011. OSLUCA. 6

7. Resource Description Format
Linked Data -
The Story So Far http://publisher.org/Journals/
JournalSWIS
title
publishedIn
http://w3c.org
http://publisher.org/Papers/ director
Paper12345
author http://w3.org/People/
Berners-Lee
year
type
2008 http://xmlns.com/foaf/
Person
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8. RDF (sintaxis)
<http://publisher.org/Papers/Paper12345>
title "Linked Data - The Story So Far";
year "2008-01-01";
author <http://w3.org/People/Berners-Lee>;
publishedIn <http://publisher.org/Journal/JournalSWIS> .
<rdf:Description
rdf:about="http://publisher.org/Papers/Paper12345">
<title>Linked Data - The Story So Far</title>
<year>2008-01-01</year>
<author rdf:resource="http://w3.org/People/Berners-Lee" />
<publishedIn
rdf:resource="http://publisher.org/Journal/JournalSWIS" />
</rdf:Description>
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9. Ontologies (vocabularies)
“An ontology is an explicit and formal specification of a shared
conceptualization1“
1Tom Gruber
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10. Linked Data Cloud
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11. Is your Linked Open Data 5 Star?
★ Available on the web (whatever
format), but with an open license
★★ Available as machine-readable
structured data (e.g. excel instead of
image scan of a table)
★★★ as (2) plus non-proprietary
format (e.g. CSV instead of excel)
★★★★ All the above plus, Use open
standards from W3C (RDF and
SPARQL) to identify things, so that
people can point at your stuff
★★★★★ All the above, plus: Link
your data to other people’s data to
provide context
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12. LINKED OPEN DATA: AN OVERVIEW
PUBLISHING DATA
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13. How is your data currently stored?
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14. How to publish Linked Data?
The Story
So Far
JournalSemanticWeb
LinkedData Berners-Lee
W3C
2008
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15. Publishing Linked Data Patterns
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16. LINKED OPEN DATA: AN OVERVIEW
CONSUMING DATA
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17. Rich interfaces (for humans)
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18. RDF Data (for machines)
<http://voa3r.cc.uah.es/dataset/resource/organisationUnits/UAH>
rdf:type cerif:OrganisationUnit ;
rdfs:label "University of Alcala" ;
cerif:acronym "UAH" ;
foaf:homepage <http://www.uah.es> ;
cerif:researchProjects
<http://voa3r.cc.uah.es/dataset/resource/projects/Organic.Edunet> ,
<http://voa3r.cc.uah.es/dataset/resource/projects/Organic.Lingua> ,
<http://voa3r.cc.uah.es/dataset/resource/projects/VOA3R> ;
cerif:members
<http://voa3r.cc.uah.es/dataset/resource/person/Salvador_Sanchez> ,
<http://voa3r.cc.uah.es/dataset/resource/person/Miguel_Refusta> ,
<http://voa3r.cc.uah.es/dataset/resource/person/Luis_Torrico> .
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19. RDF Data (for humans)
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20. Querying RDF Data
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21. Developing web mashups
Internet Navigator
File Favourites Help
URL: http://mashup.org
Data
warehouse
mashup
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22. PUBLISHING LINKED DATA FROM RELATIONAL
DATABASES
CONCLUSIONS
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23. Conclusions
 Web based on documents  Web based
on Data.
 Linked Data as a way for interchanging
data between different datasets in the
Web.
 RDF as a standard format to describe
data.
 Main aim: Create new third-party
applications using open linked data from
LD systems.
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24. References
 Linked Data: Evolving the Web into a
Global Data Space
◦ http://linkeddatabook.com/
 W3C Linking Open Data Project
◦ http://www.w3.org/wiki/SweoIG/TaskForces/C
ommunityProjects/LinkingOpenData
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25. Linked Open Data: an overview
thanks
Iván Ruiz Rube
ivan.ruiz@uca.es
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