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Linked Data: opportunities and challenges

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Presentation about opportunities and challenges concerning Linked Data at the Open Science Data Cloud NSF PIRE Workshop [1] on 18 July 2012 in Edinburgh, UK. …

Presentation about opportunities and challenges concerning Linked Data at the Open Science Data Cloud NSF PIRE Workshop [1] on 18 July 2012 in Edinburgh, UK.

[1] http://www.opensciencedatacloud.org/osdc-edinburgh-workshop-71612-71712/

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  • In the Figure each node representsa distinct dataset and arcs indicate the existenceof links between data elements in the two data sets.
  • Some 300 datasets, 35billion facts, over 500 million links
  • Transcript

    • 1. Digital Enterprise Research Institute www.deri.ie Linked Data: opportunities and challenges Dr. Michael Hausenblas, DERI, NUI Galway Open Science Data Cloud NSF PIRE Workshop, Edinburgh, UK, 18 July 2012 Copyright 2011 Digital Enterprise Research Institute. All rights reserved. Enabling Networked Knowledge
    • 2. Linked Data 101
    • 3. Linked Data principles① Use URIs to identify the “things” in your data② Use HTTP URIs so people & machines can look them up③ When a URI is looked up return a description of the thing in a structured format (RDF)④ Link to related things to provide context http://www.w3.org/DesignIssues/LinkedData.html
    • 4. HTTP URIs
    • 5. HTTP URIscurl -L -H "Accept: application/rdf+xml" http://dbpedia.org/resource/Edinburgh<?xml version="1.0" encoding="utf-8" ?><rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#" xmlns:dbpedia-owl="http://dbpedia.org/ontology/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dbpprop="http://dbpedia.org/property/" xmlns:ns10="http://dbpedia.org/property/start/" > <rdf:Description rdf:about="http://dbpedia.org/resource/Firrhill_High_School"> <dbpedia-owl:city rdf:resource="http://dbpedia.org/resource/Edinburgh" /> </rdf:Description> <rdf:Description rdf:about="http://dbpedia.org/resource/Murrayfield_Stadium"> <dbpedia-owl:location rdf:resource="http://dbpedia.org/resource/Edinburgh" /> <dbpprop:location rdf:resource="http://dbpedia.org/resource/Edinburgh" /> </rdf:Description> <rdf:Description rdf:about="http://dbpedia.org/resource/Stewart%27s_Melville_College"> <dbpedia-owl:city rdf:resource="http://dbpedia.org/resource/Edinburgh" /> <dbpprop:city rdf:resource="http://dbpedia.org/resource/Edinburgh" /> </rdf:Description>
    • 6. HTTP URIscurl -L -H "Accept: text/turtle" http://data.ordnancesurvey.co.uk/id/7000000000017765<http://data.ordnancesurvey.co.uk/doc/7000000000017765> rdf:type foaf:Document, dctype:Text ; foaf:primaryTopic <http://data.ordnancesurvey.co.uk/id/7000000000017765> ; dct:title "Linked Data for The County of Hampshire" ; dct:hasFormat <http://data.ordnancesurvey.co.uk/doc/7000000000017765.rdf> , <http://data.ordnancesurvey.co.uk/doc/7000000000017765.html> , <http://data.ordnancesurvey.co.uk/doc/7000000000017765.json> , <http://data.ordnancesurvey.co.uk/doc/7000000000017765.ttl> .<http://data.ordnancesurvey.co.uk/id/7000000000017636> rdfs:label "Tadley" ; skos:prefLabel "Tadley" .<http://data.ordnancesurvey.co.uk/id/7000000000017510> rdfs:label "Newton Valence" ; skos:prefLabel "Newton Valence" .<http://data.ordnancesurvey.co.uk/id/7000000000017817> rdfs:label "Ashmansworth" ; skos:prefLabel "Ashmansworth" .
    • 7. HTTP URIscurl -L -H "Accept: text/turtle” http://bio2rdf.org/genbank:AC008393@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .@prefix owl: <http://www.w3.org/2002/07/owl#> .@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .@prefix dc: http://purl.org/dc/elements/1.1/ .<http://bio2rdf.org/genbank:AC008393> a <http://bio2rdf.org/genbank_resource:Sequence> ; rdfs:label "Homo sapiens chromosome 5 clone CTC-241N9, complete sequence [genbank:AC008393]"; owl:sameAs <http://bio2rdf.org/genbank:ac008393> ; dc:title "Homo sapiens chromosome 5 clone CTC-241N9, complete sequence" ; dc:modified "26-FEB-2002" ; <http://bio2rdf.org/bio2rdf_resource:length> "166847" ; <http://bio2rdf.org/bio2rdf_resource:linkedToFrom>
    • 8. HTTP URIscurl -L -H "Accept: text/turtle” http://bnb.data.bl.uk/doc/resource/009468944@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .@prefix dct: <http://purl.org/dc/terms/> .@prefix blterms: <http://www.bl.uk/schemas/bibliographic/blterms#> .@prefix elements: <http://iflastandards.info/ns/isbd/elements/> .@prefix bibo: <http://purl.org/ontology/bibo/> .@prefix owl: <http://www.w3.org/2002/07/owl#> .@prefix foaf: <http://xmlns.com/foaf/0.1/> .@prefix linked-data: <http://purl.org/linked-data/api/vocab#> .@prefix void: <http://rdfs.org/ns/void#> .<http://bnb.data.bl.uk/id/resource/009468944> dct:language <http://lexvo.org/id/iso639-3/eng> ; rdfs:seeAlso <http://www4.wiwiss.fu-berlin.de/bookmashup/books/0859761541> ; elements:P1053 "vii,147p."@en ; rdfs:label "William Wallace / Andrew Fisher" ; blterms:bnb "GB8714157" ; dct:creator <http://bnb.data.bl.uk/id/person/FisherAndrew1935-> ; bibo:isbn10 "0859761541" ; dct:title "William Wallace" ; rdf:type bibo:Book , dct:BibliographicResource ; dct:subject <http://bnb.data.bl.uk/id/concept/ddc/e19/941.1020924> .
    • 9. Linked Open Data
    • 10. Linked Open Data cloud 2007 2008 2008 2010 2009 2008 2009 2008 10
    • 11. Linked Open Data cloudhttp://lod-cloud.net/ Over 300 open data sets with 40 billion facts, interlinked by 500 million typed links.
    • 12. Linked Open Data cloud statsDigital Enterprise Research Institute www.deri.ie triples distribution links distribution http://lod-cloud.net/state/ Enabling Networked Knowledge
    • 13. … cost and benefits
    • 14. Linked Data life cycles
    • 15. Linked Data life cyclesDigital Enterprise Research Institute www.deri.ie http://linked-data-life-cycles.info 1 2 3 4 5 6 data modeling publishing discovery integration use cases awareness LOD cloud Neologism Google Refine FYN LATC 24/7 data-gov.ie 5stardata.info Schema.org D2RQ LATC DSI Enabling Networked Knowledge
    • 16. ModelingDigital Enterprise Research Institute www.deri.ie 1 2 3 4 5 6 data modeling publishing discovery integration use cases awareness LOD cloud Neologism Google Refine FYN LATC 24/7 data-gov.ie 5stardata.info Schema.org D2RQ LATC DSI Enabling Networked Knowledge
    • 17. NeologismDigital Enterprise Research Institute www.deri.ie http://neologism.deri.ie/ Enabling Networked Knowledge
    • 18. NeologismDigital Enterprise Research Institute www.deri.ie http://vocab.data.gov/ Enabling Networked Knowledge
    • 19. Schema.org – Linked DataDigital Enterprise Research Institute www.deri.ie Enabling Networked Knowledge
    • 20. PublishingDigital Enterprise Research Institute www.deri.ie 1 2 3 4 5 6 data modeling publishing discovery integration use cases awareness LOD cloud Neologism Google Refine FYN LATC 24/7 data-gov.ie 5stardata.info Schema.org D2RQ LATC DSI Enabling Networked Knowledge
    • 21. Google Refine extensionDigital Enterprise Research Institute www.deri.iehttp://lab.linkeddata.deri.ie/2010/grefine-rdf-extension/ Enabling Networked Knowledge
    • 22. RDB2RDF – D2RQDigital Enterprise Research Institute www.deri.iehttp://d2rq.org/ Enabling Networked Knowledge
    • 23. DiscoveryDigital Enterprise Research Institute www.deri.ie 1 2 3 4 5 6 data modeling publishing discovery integration use cases awareness LOD cloud Neologism Google Refine FYN LATC 24/7 data-gov.ie 5stardata.info Schema.org D2RQ LATC DSI Enabling Networked Knowledge
    • 24. Follow-Your-NoseDigital Enterprise Research Institute www.deri.ie Enabling Networked Knowledge 24
    • 25. Dataset discoveryDigital Enterprise Research Institute www.deri.iehttp://dsi.lod-cloud.net/ Enabling Networked Knowledge
    • 26. IntegrationDigital Enterprise Research Institute www.deri.ie 1 2 3 4 5 6 data modeling publishing discovery integration use cases awareness LOD cloud Neologism Google Refine FYN LATC 24/7 data-gov.ie 5stardata.info Schema.org D2RQ LATC DSI Enabling Networked Knowledge
    • 27. Why linking?Digital Enterprise Research Institute www.deri.ie http://webofdata.wordpress.com/2011/05/22/why-we-link/Central Contractor Registration (CCR) Geonames Enabling Networked Knowledge
    • 28. Effort distributionDigital Enterprise Research Institute www.deri.ie Third Fix Publisher‘s Party Effort Overall Data Effort Integration Effort Consumer‘s Effort Enabling Networked Knowledge
    • 29. LATC – Interlinking PlatformDigital Enterprise Research Institute www.deri.iehttp://latc-project.eu/platform Enabling Networked Knowledge
    • 30. http://www4.wiwiss.fu-berlin.de/latc/toollibrary/screencast.html
    • 31. ConclusionDigital Enterprise Research Institute www.deri.ie Opportunities  Use the LOD cloud as test-bed (experiments)  Benefit from LOD cloud in apps (context)  Contribute to make your data more valuable Challenges  Large-scale processing of Linked Data  Distributed/federated SPARQL queries  Quality of links and the data Enabling Networked Knowledge
    • 32. ResourcesDigital Enterprise Research Institute www.deri.ie Tutorials, technologies, specifications:  http://linkeddatabook.com  http://lod-cloud.net  http://linkeddata.org  http://linkeddata-specs.info  http://schema.rdfs.org Videos:  http://ted.com/talks/tim_berners_lee_on_the_next_web.html - Tim Berners-Lee’s TED talk  http://www.youtube.com/watch?v=GKfJ5onP5SQ - Linked Data (and the Web of Data)  http://www.youtube.com/watch?v=4x_xzT5eF5Q - What is Linked Data?  http://vimeo.com/36752317 - Linked Open Data (by Europeana) Enabling Networked Knowledge