Get on the Linked Data Web!

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  • Though the current evolution of standarization, implementation and adoption of the Semantic Web are advancing at a reasonable pace, given the complexities of its main goal: A Web of linked true knowledge... Yet we all: standards authorities, librarians, developers, designers, schoolars, researchers, entrepreuners, funders, governements and end users, need urgently foresee and be aware about that it’s not the same, and certainly not requires the same efforts and engagement, linking data, writing embeded metadata and building clever ontologies; than solving the each second and forever changing dynamic puzzle of the universal humankind knowledge and put its sinergy to work for every woman and men in need of knowing... The sooner we, better than understand, comprehend how knowledge is born, risen, multiplied and, best of all, taught; the sooner the Semantic Web shall become a dream made reality.

    I want to add: If we take care of conprehending, not only how it works, but mainly what the human mind is... Specially not taking it as the same entity, than the human brain or lesser yet, than the process outcome of this later material thing performance.; we will be capable of getting the best success the Semantic Web should have.

    After all, the universal humankind knowledge as a whole, is the only non-material, but alive entity, wich even if it has in common with any alive been, those attribuutes of: birth, rise and multiply... It certainly deserves never die... And we are whose whom have in our hands the opportunity to ensure that Human Knoledge will last forever.
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  • Economic context
  • Policy, governmental context
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  • Get on the Linked Data Web!

    1. 1. Get on the Linked Data Web!<br />Tudor Groza, The University of Queensland<br />Armin Haller, CSIRO ICT Canberra<br />Meta 2011<br />Canberra, 26 May 2011<br />
    2. 2. Linked Data<br />Why now ?<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />2<br />
    3. 3. 2007 Gartner predictions<br />During the next 10 years, Web-based technologies will improve the ability to embed semantic structures [… it] will occur in multiple evolutionary steps …<br />By 2017, we expect the vision of the Semantic Web […] to coalesce […] and the majority of the Web pages are decorated with some form of semantic hypertext…<br />By 2012, 80% of the public Web sites will use some level of semantic hypertext to create SW documents […] 15% of public Web sites will use more extensive Semantic Web-based ontologies to create semantic databases …<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />3<br />RDFa, microformats (hcard, hatom ,etc …)<br />[Adapted from Ivan Herman (W3C), RDFa, 2011]<br />
    4. 4. Metadata in Use<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />4<br />[Peter Mika (Yahoo!), RDFa, 2011]<br />
    5. 5. Australian context<br />Draft principles for the Open Public Section Information<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />5<br />
    6. 6. Technical context<br />6<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />png<br />svg<br />KR<br />AJAX<br />Speech<br />Recognition<br />HTML<br />linkback<br />Semantic <br />Web<br />Technologies<br />WCAG<br />Coreference<br />CSS<br />WebApps<br />RDF<br />SPARQL<br />Entity<br />Extraction<br />URIs<br />SSL<br />Linked<br />Data<br />DL<br />OWL<br />HTTP<br />JavaScript<br />SKOS<br />Theorem<br />Proving<br />XPath<br />RIF<br />XML<br />GRDDL<br />Web<br />Technologies<br />Logic<br />Programming<br />Semantic<br />Technologies<br />XSLT<br />[Sandro Hawke(W3C), Introduction to Linked Data, 2010]<br />
    7. 7. Why Linking Data?<br />Applications can find data<br />… without centralization<br />No central bottlenecks<br />No central point-of-failure<br />No central policies<br />No need for permission<br />Use existing …<br />social structures<br />Web structures <br />7<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    8. 8. Data flow<br />8<br />Web Data Apps<br />Inference<br />(Knowledge discovery)<br />Linked Data<br />Semantic data<br />Data in <br />SQL DBs<br />Etc …<br />Data in<br />Spreadsheets<br />Crowd source<br />data<br />XML<br />Data<br />Raw Sensor<br />Data<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />[Adapted from Sandro Hawke(W3C), Introduction to Linked Data, 2010]<br />
    9. 9. Linked Data cloud growth<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />9<br />As of May 2007<br />
    10. 10. Linked Data cloud growth<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />10<br />As of February 2008<br />
    11. 11. Linked Data cloud growth<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />11<br />As of July 2009<br />
    12. 12. Linked Data cloud growth<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />12<br />As of September 2010<br />[Richard Cyganiak, AnjaJentzsch, Linking Open Data cloud diagram, 2011]<br />
    13. 13. Linked Data principles<br />13<br />13<br />
    14. 14. Linked Data principles<br />1. Enable linking<br />Good Website design<br />2. Publish semantic (meta)data<br />Export data in RDF<br />3. Use real (live) URIs<br />The heart of Linked Data<br />14<br />14<br />
    15. 15. 1. Enable linking<br />Put your information on your website<br />Invest in content management<br />Consider offering public APIs<br />Use goodURLs<br />Readable, unambiguous … even in 10 years<br />http://example.com/index.php?123456 <br />http://example.com/about/staff/john-doe<br />URL survival plan<br />Support …<br />Caching<br />Content negotiation<br />15<br />15<br />[Adapted from Sandro Hawke(W3C), Introduction to Linked Data, 2010]<br />
    16. 16. 2. Publish semantic data<br />Semantic data RDF<br />Provide comprehensive information for all items<br />For each question about the item … provide an answer<br />16<br />Premier?<br />Nickname?<br />Capital?<br />16<br />
    17. 17. 2. Publish semantic dataRDF<br />RDF – Resource Description Framework<br />Knowledge representation language for the Semantic Web<br />Add structured information to Web resources<br />RDF as data model<br />Statements about Web resources <br />Triples: Subject – Predicate – Object<br />Graph on URIs<br />17<br />17<br />
    18. 18. 2. Publish semantic dataURIs<br />URI – Uniform Resource Identifier<br />Compact sequence of characters …<br />… identifies an abstract or physical resource<br />[RFC3986]<br />URI ≈ URL<br />http://www.morganclaypool.com/book/S00334ED1V01Y201102WBE001<br />Linked Data world<br />URI references<br />18<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    19. 19. 2. Publish semantic dataRDF (cont.)<br />RDF triples<br />Subject: URI reference or BNode<br />Predicate: URI reference<br />Object: URI reference or BNode or Literal<br />RDF “data types”<br />URI references<br />BNodes– blank nodes  node without a name<br />Literals – actual values of simple (usual) data types, e.g., int, long, string, etc…<br />19<br />19<br />
    20. 20. 2. Publish semantic dataRDF Example<br />20<br />http://www.morganclaypool.com/book/S00334ED1V01Y201102WBE001<br />Publisher<br />Title<br />Author<br />Book series<br />Editor<br />20<br />
    21. 21. 2. Publish semantic dataRDF Example (cont.)<br />21<br />http://www.morganclaypool.com/book/S00334ED1V01Y201102WBE001<br />has a<br />dc:title<br />which is<br />21<br />
    22. 22. 2. Publish semantic dataRDF Example (cont.)<br />22<br />http://www.morganclaypool.com/book/S00334ED1V01Y201102WBE001<br />has a<br />dc:creator<br />whose name is<br />has<br />another<br />whose name is<br />dc:creator<br />22<br />
    23. 23. 2. Publish semantic dataRDF Example (cont.)<br />23<br />http://www.morganclaypool.com/book/S00334ED1V01Y201102WBE001<br />has a<br />which is<br />dc:publisher<br />23<br />
    24. 24. 2. Publish semantic dataRDF Example (cont.)<br />24<br />http://www.morganclaypool.com/book/S00334ED1V01Y201102WBE001<br />is part of<br />bibo:bkseries<br />which is<br />24<br />
    25. 25. 2. Publish semantic dataRDF Example (cont.)<br />25<br />http://www.morganclaypool.com/book/S00334ED1V01Y201102WBE001<br />is part of<br />which is<br />dc:publisher<br />bibo:bkseries<br />which is<br />has a<br />25<br />
    26. 26. 2. Publish semantic dataRDF Example (cont.)<br />@prefix dc: <http://purl.org/dc/terms/> .<br />@prefix bibo: <http://purl.org/bibo/> .<br />@prefix : <http://www.morganclaypool.com/book/> .<br />:S00334ED1V01Y201102WBE001 dc:title “Linked Data …” .<br />:S00334ED1V01Y201102WBE001 dc:creator “Tom Heath” .<br />:S00334ED1V01Y201102WBE001 dc:creator “Christian Bizer” .<br />:S00334ED1V01Y201102WBE001 dc:publisher “Morgan & Claypool” .<br />:S00334ED1V01Y201102WBE001 bibo:bkseries “Synthesis Lectures …” .<br />26<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    27. 27. 2. Publish semantic dataOntologies<br /><ul><li>RDF triples use predicates to link
    28. 28. Resources to resources
    29. 29. Resources to property values
    30. 30. How about assigning meaning / semantics to resources?</li></ul>27<br />27<br />
    31. 31. 2. Publish semantic dataOntologies (cont.)<br />Ontologies<br />Shared conceptualization of a domain<br />Classification of domain concepts<br />Meaningful relations between domain concepts<br />In essence … “typed”schema<br />28<br />
    32. 32. 2. Publish semantic dataOntologies (cont.)<br />29<br />http://www.morganclaypool.com/book/S00334ED1V01Y201102WBE001<br />has a<br />dc:creator<br />whose name is<br />is<br />has<br />another<br />Person<br />is<br />whose name is<br />dc:creator<br />29<br />
    33. 33. 2. Publish semantic dataOntologies (cont.)<br />Ontology defines (e.g. FOAF ontology)<br />Person<br /> Class<br /> URI – e.g., http://xmlns.com/foaf/Agent<br /> A perspective of the concept via attributes / properties: name, age, gender, …<br />Example<br />Tom Heathis-aPerson<br />Christian Bizeris-aPerson<br />Tom Heath, Christian Bizer – characterized by the attributes defined in the Person class<br />30<br />30<br />
    34. 34. A bit of history …<br />A first use case for RDF was website metadata<br />3. Use real (live) URIs<br />31<br />Example<br /><ul><li>Website of city of Canberra</li></ul>Subject<br /><ul><li>http://www.canberra.com.au</li></ul>Property<br /><ul><li>When was it created?</li></ul>Value<br /><ul><li>10-11-2008</li></ul>31<br />
    35. 35. 3. Use real (live) URIs (cont.)<br />This looks great<br />Web page has a URL<br />Content and the metadata is served via Browser<br />Unfortunately … it didn’t really work<br />Because …<br />32<br />32<br />
    36. 36. 3. Use real (live) URIsThe problem<br />The problem<br />So what is the URI of Canberra?<br />Canberra is a city not a Web page<br />Canberra was established on 12-03-1913<br />www.canberra.com.au was created on 10-11-2008<br />Requirements<br />Don’t mix Canberra with www.canberra.com.au<br />Get data via existing protocols<br />… a challenge<br />33<br />33<br />[Adapted from Sandro Hawke(W3C), Introduction to Linked Data, 2010]<br />
    37. 37. 3. Use real (live) URIs (cont.)<br />Identifiers are required for things<br />People, places, companies, products, courses, schools, buildings, plants, concerts, talks, species of plants, songs, musicians, etc …<br />… all the things we have questions about<br />… and all the questions<br />… and all the answers<br />Which become things on their own<br />34<br />34<br />[Adapted from Sandro Hawke(W3C), Introduction to Linked Data, 2010]<br />
    38. 38. 3. Use real (live) URIsSolutions<br />Solution 1 - Hash URI<br />In HTML<br />http://www.w3.org/People/Berners-Lee/#Speaking<br />Section in a webpage<br />However, fragment semantics are up to content-type …<br />In RDF<br />http://www.w3.org/People/Berners-Lee/card#i<br />Fragment can be ANYTHING in the world<br />Identifies Tim Berners-Lee not a section in the HTML page<br />35<br />35<br />
    39. 39. 3. Use real (live) URIsSolutions (cont.)<br />Solution 2 - Slash URIs<br />In Browser<br />GET http://dbpedia.org/resource/Canberra<br />Server responds with redirect<br />303 See other<br />LOCATION http://dbpedia.org/page/Canberra<br />Two URIs<br />A URI for the thing itself (in RDF for machines)<br />A URI for a Web page (in HTML for humans)<br />36<br />
    40. 40. One last thing … integration<br />Following the principles<br />… create semantic data<br />… publish semantic data<br />… how about integration / linking?<br />Solutions<br />Re-using established URIs<br />Explicit entity consolidation (via URIs)<br />SPARQL queries<br />37<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    41. 41. Explicit entity consolidation (via URIs)<br />38<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />http://www.morganclaypool.com/book/S00334ED1V01Y201102WBE001<br />has a<br />dc:creator<br />whose name is<br />http://tomheath.com/id/me<br />has<br />another<br />?<br />http://data.semanticweb.org/person/tom-heath<br />whose name is<br />dc:creator<br />
    42. 42. Explicit entity consolidation (via URIs)<br />Linking similar concepts publishing in different datasets<br />In principle, two types of relations<br />owl:sameAs – strong assertion!<br />rdfs:seeAlso – weak (loose) relation<br />39<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    43. 43. SPARQL queries<br />On-the-fly integration<br />SPARQL<br />Query language for semantic data (RDF)<br />Across diverse datasets<br />… similar to SQL from the DB world<br />40<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    44. 44. SPARQL queries<br />41<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />prefix go: <http://purl.org/obo/owl/GO#><br />prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#><br />prefix owl: <http://www.w3.org/2002/07/owl#><br />...<br />select ?genename ?processname<br />where<br />{ graph <http://purl.org/commons/hcls/pubmesh><br /> { ?paper ?p mesh:D017966 .<br /> ?article sc:identified_by_pmid ?paper.<br /> ?gene sc:describes_gene_or_gene_product_mentioned_by ?article.<br /> }<br /> graph <http://purl.org/commons/hcls/goa><br /> { ?protein rdfs:subClassOf ?res.<br /> ?res owl:onPropertyro:has_function.<br /> ?res owl:someValuesFrom ?res2.<br /> ?res2 owl:onPropertyro:realized_as.<br /> ?res2 owl:someValuesFrom ?process.<br /> graph <http://purl.org/commons/hcls/20070416/classrelations><br /> {{ ?process <http://purl.org/obo/owl/obo#part_of> go:GO_0007166}<br /> union<br /> { ?process rdfs:subClassOfgo:GO_0007166 }}<br /> ?protein rdfs:subClassOf ?parent.<br /> ?parent owl:equivalentClass ?res3.<br /> ?res3 owl:hasValue ?gene.<br /> }<br /> graph <http://purl.org/commons/hcls/gene><br /> { ?gene rdfs:label ?genename }<br /> graph <http://purl.org/commons/hcls/20070416><br /> { ?process rdfs:label ?processname}<br />}<br />MeSH: Pyramidal Neurons<br />PubMed: Journal Articles<br />Entrez Gene: Genes<br />GO: Signal Transduction<br />[Ivan Herman(W3C), Semantic Web Adoption and Applications, 2011<br />
    45. 45. Linked Data principles - Recap<br />1. Publish semantic data<br />2. Enable linking<br />3. Use real (live) URIs<br />42<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    46. 46. Open Public Sector Information - Draft principles - <br />Open access to information<br />Free<br />Based on open standards<br />Easily discoverable<br />Understandable<br />Machine-readable<br />Freely reusable and transformable<br />Robust information asset management frameworks<br />adequately describing information assets using appropriate metadata<br />documenting known limitations on data quality and caveats on data use<br />preserving the agency's information assets for appropriate periods of time<br />43<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />RDF – Semantic Data<br />Live URIS + Linking enabled<br />Quality<br />Availability<br />Preservation<br />
    47. 47. Open Public Sector Information - Draft principles - <br />Findable information<br />Ensuring that published information has high quality metadata …<br />Publishing the agency's information asset register to enable […] to identify the available information resources from a single source<br />Open and accessible formats online<br />Open<br />Machine-readable<br />Searchable and indexable by commonly used Web search applications<br />44<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />Live URIS + Linking enabled<br />Linked<br />Data<br />Web !<br />
    48. 48. In practice …<br />45<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    49. 49. RDF … a “tool” for agents<br />RDF annotations often express metadata …<br />usually stored in a separate .rdf file <br />useful for agents, limited use for humans<br />46<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    50. 50. Data for the Web of Data<br />Apart for relational DBs, most of the Web content is in … (X)HTML<br />New content is generated on a daily basis<br />Quest<br />How do get structured data from this content?<br />47<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />[Adapted from Ivan Herman (W3C), RDFa, 2011]<br />
    51. 51. The “traditional” Web<br />Authors create HTML content<br />… do not generate individual and separate RDF/XML files<br />Reasons?<br />RDF/XML is complex<br />It requires separate storage, generation<br />In any situation … it represents an overhead<br />48<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />[Adapted from Ivan Herman (W3C), RDFa, 2011]<br />
    52. 52. Solution … RDFa<br />Add extra structured content to<br />(X)HTML pages<br />Allow processors to extract this information and turn it into RDF<br />RDFa … a “tool” for agents and humans<br />49<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />[Adapted from Ivan Herman (W3C), RDFa, 2011]<br />
    53. 53. RDFa<br />50<br />50<br />
    54. 54. RDFa<br />RDFa = RDF in attributes<br />Markup data in Web pages<br />Encodes RDF triples in (X)HTML<br />Represents a complete serialization of RDF<br />Mechanism<br />Adds extra attributes in (X)HTML<br />Uses namespaces and URIs<br />Integration is just as easy as in RDF<br />51<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    55. 55. RDFa example – HTML<br /><html><br /> <head><br />…<br /> </head><br /> <body><br /><p><br />Morgan & Claypool Publishers<br /> </p><br /> <p><br />Linked Data<br/><br />Evolving the Web into a Global Data Space <br/><br />Tom Heath <br/><br />Christian Bizer<br /> </p><br /> <p><br />Synthesis lectures on The Semantic Web: Theory and Technology <br/><br />James Hendler, Series Editor<br /> </p><br /></body><br /></html><br />52<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    56. 56. RDFa example – RDFa<br /><html prefix=“dc: http://purl.org/dc/terms/”<br />base="http://www.morganclaypool.com/book/S00334…WBE001"><br /> <head><br />…<br /> </head><br /> <body><br /><p about=""><br /><span property="dc:publisher">Morgan & Claypool Publishers</span><br /> </p><br /> <p about=""><br /><span property="dc:title">Linked Data</span><br/><br /><span property="dc:title">Evolving the Web into a Global Data Space</span><br/><br /><span property="dc:creator">Tom Heath</span> <br/><br /><span property="dc:creator">Christian Bizer</span><br /> </p><br /> <p about=""><br /><span property=”bibo:bkseries">Synthesis lectures on The Semantic Web: Theory and Technology</span><br/><br />James Hendler, Series Editor<br /> </p><br /></body><br /></html><br />53<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    57. 57. In essence …<br />The same (X)HTML file containing RDFa<br />Is used … unchanged … by browsers<br />Browsers ignore attributed they don’t reconigze<br />Can be used by specialized processors to extract RDF<br />54<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    58. 58. Datasets, tools and applications<br />55<br />55<br />
    59. 59. Raw datasets<br />Great … but not really there yet<br />APIs enable access<br />… but not necessarily enable linking …<br />… it is still a step ahead though …<br />56<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    60. 60. Raw datasets (cont.)<br />Australian Government<br />57<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    61. 61. Raw datasets (cont.)<br />US Government<br />58<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    62. 62. Linked Data datasets<br />DBPedia<br />Community effort<br />Extract structured information from Wikipedia info boxes<br />Core of the Linked Data Web<br />59<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    63. 63. Linked Data datasets<br />60<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />@prefix dbpedia <http://dbpedia.org/resource/>.<br />@prefix dbprop <http://dbpedia.org/property/>.<br />dbpedia:Canberra<br />dbprop:name "Canberra" ;<br />geo:lat "-35.308056" ;<br />geo:lat "35.307499" ;<br />geo:long "149.124420" ;<br />geo:long "149.124451" ;<br />dbprop:est "1913-03-12" ;<br />dbprop:populationTotal "315868" ;<br />dbprop:area "814" ;<br /> ...<br />dbpedia:AIS_Arena<br />dbpedia:locationdbpedia:Canberra ;<br />
    64. 64. Linked Data datasets<br />61<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />BBC<br />Nature<br />Programs<br />Music<br />
    65. 65. Linked Data datasets (cont.)<br />New York Times<br />As of January 2010 … 10,000 subject headings<br />~3,000 organizations<br />~5,000 people<br />~2,000 locations<br />62<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    66. 66. Linked Data datasets (cont.)<br />UK Government – data.gov.uk<br />6,900 datasets<br />Dept. for Business, Innovation and Skills<br />Dept. for Transport<br />Dept. of Health<br />63<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    67. 67. Linked Data datasets (cont.)<br />64<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    68. 68. Storage Support<br />Virtuoso<br />RDF triple store<br />SPARQL access<br />http://virtuoso.openlinksw.com/<br />Talis<br />SaaS<br />Cloud-based RDF storage<br />SPARQL access<br />REST APIs<br />http://www.talis.com/platform<br />Sesame<br />RDF triple store<br />SPARQL access<br />http://www.openrdf.org/<br />65<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    69. 69. Indexing, APIs & Frameworks<br />Sindice.com & Sig.ma<br />The Semantic Web index<br />Large scale data acquisition<br />Data discovery & Mash-up<br />Synchronization <br />RDF APIs<br />Jena<br />ARC2<br />Any23<br />Frameworks<br />SILK<br />PAGET<br />66<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    70. 70. RDFa adopters<br />67<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />Facebook<br />RDFa in OpenGraph Protocol<br />April 2010<br />Any web page linked in the graph as a node<br />Simple markup<br />
    71. 71. RDFa adopters<br />68<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />[Adapted from Knud Moeller(DERI Galway), RDFa everywhere, 2010]<br />
    72. 72. RDFa adopters<br />69<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    73. 73. RDFa adopters<br />70<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    74. 74. RDFa adopters<br />71<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    75. 75. RDFa adopters<br />72<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br /><div typeof="austlit:Work" id="CMCg" about="#CMCg" property="austlit:topicID" content="CMCg"><br /> <br /><span rel="austlit:hasTitle"><br /> <span typeof="austlit:Title”id="SPJi" about="#SPJi”property="austlit:title"><br /> The Drover’s Wife<br /> </span><br /></span><br /> <br /><span rel="austlit:form"><br /> <span typeof="austlit:Form" about="http://austlit.../ns#i$” property="austlit:topicName"><br /> short story<br /> </span><br /></span><br />
    76. 76. Drupal 7!<br />73<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    77. 77. Drupal 7!<br />Widely adopted open source CMS<br />ING, Tesla motors, Garmin, Ebay, US House of Representatives, Yahoo! Style guide, FOI@DEEWR, …<br />RDFa support out of the box!<br />Common content types mapped to concepts from DublinCore, FOAF or SIOC<br />Without any technical knowledge … you’re publishing Linked Data!<br />74<br />Haller, Groza - Get on the Linked Data Web! (Meta 2011)<br />
    78. 78. Get on the Linked Data Web!<br />Armin Haller<br /> CSIRO ICT Canberra<br />W3C Office Australia<br />Contact: armin@w3.org<br />Tudor Groza<br />The University of Queensland<br />Contact: tudor.groza@uq.edu.au<br />Meta 2011<br />Canberra, 26 May 2011<br />

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