Iván Ruiz Rube presents an overview of Linked Open Data. He discusses how publishing structured data using open standards like RDF and SPARQL allows data to be interlinked and more useful. Ruiz Rube explains how to publish data as Linked Open Data using different patterns and how consuming Linked Data involves developing rich interfaces for humans and querying data for machines using SPARQL. The goal of Linked Open Data is to create new applications by linking open datasets on the web.

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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