Linked Open Data: an overview

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Linked Open Data: an overview

  1. 1. Linked Open Data: an overview Iván Ruiz RubeDepartamento de Lenguajes y Sistemas Informáticos Universidad de Cádiz 16/12/2011 Hackaton 2011. OSLUCA. 1
  2. 2. Roadmap Introduction Publishing Data Consuming Data Conclusions 16/12/2011 Hackaton 2011. OSLUCA. 2
  3. 3. LINKED OPEN DATA: AN OVERVIEWINTRODUCTION 16/12/2011 Hackaton 2011. OSLUCA. 3
  4. 4. Introduction  Huge amount of information  A large number of information systems  Big challenges: ◦ Data integration ◦ Data analysis 16/12/2011 Hackaton 2011. OSLUCA. 4
  5. 5. Need for open data  Improvement of organizational transparency  Public data  Foster the research  Promote the development of third-party system 16/12/2011 Hackaton 2011. OSLUCA. 5
  6. 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. 7. Resource Description Format Linked Data - The Story So Far http://publisher.org/Journals/ JournalSWIS title publishedIn http://w3c.orghttp://publisher.org/Papers/ director Paper12345 author http://w3.org/People/ Berners-Lee year type 2008 http://xmlns.com/foaf/ Person 16/12/2011 Hackaton 2011. OSLUCA. 7
  8. 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> 16/12/2011 Hackaton 2011. OSLUCA. 8
  9. 9. Ontologies (vocabularies)“An ontology is an explicit and formal specification of a shared conceptualization1“1Tom Gruber 16/12/2011 Hackaton 2011. OSLUCA. 9
  10. 10. Linked Data Cloud 16/12/2011 Hackaton 2011. OSLUCA. 10
  11. 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 16/12/2011 Hackaton 2011. OSLUCA. 11
  12. 12. LINKED OPEN DATA: AN OVERVIEWPUBLISHING DATA 16/12/2011 Hackaton 2011. OSLUCA. 12
  13. 13. How is your data currently stored? 16/12/2011 Hackaton 2011. OSLUCA. 13
  14. 14. How to publish Linked Data? The Story So Far JournalSemanticWeb LinkedData Berners-Lee W3C 2008 16/12/2011 Hackaton 2011. OSLUCA. 14
  15. 15. Publishing Linked Data Patterns 16/12/2011 Hackaton 2011. OSLUCA. 15
  16. 16. LINKED OPEN DATA: AN OVERVIEWCONSUMING DATA 16/12/2011 Hackaton 2011. OSLUCA. 16
  17. 17. Rich interfaces (for humans) 16/12/2011 Hackaton 2011. OSLUCA. 17
  18. 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> . 16/12/2011 Hackaton 2011. OSLUCA. 18
  19. 19. RDF Data (for humans) 16/12/2011 Hackaton 2011. OSLUCA. 19
  20. 20. Querying RDF Data 16/12/2011 Hackaton 2011. OSLUCA. 20
  21. 21. Developing web mashups Internet Navigator File Favourites Help URL: http://mashup.org Data warehouse mashup 16/12/2011 Hackaton 2011. OSLUCA. 21
  22. 22. PUBLISHING LINKED DATA FROM RELATIONALDATABASESCONCLUSIONS 16/12/2011 Hackaton 2011. OSLUCA. 22
  23. 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. 16/12/2011 Hackaton 2011. OSLUCA. 23
  24. 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 16/12/2011 Hackaton 2011. OSLUCA. 24
  25. 25. Linked Open Data: an overview thanks Iván Ruiz Rube ivan.ruiz@uca.es 16/12/2011 Hackaton 2011. OSLUCA. 25

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