shared innovationSchema.org• The Semantic Web has gone mainstream!• But theyre trying to create one ontology for everything!• Is it linked to anything else?
shared innovationIssues, PDF through Microdata• Structure, parseability – How do we validate what were extracting? – Is there an underlying data model?• How do we know what the data means?• How do you relate parts of the data together?• How do consumers discover related data?
shared innovationData on the Web != A Web of Data
shared innovationIf there are no links, its not a Web!
shared innovationWhat is the Web of Data?• A boundless graph of interconnected data available online...
shared innovation What is a Graph? Talis Education Tom employedBy locatedIn Italy studentOf bornIn EnglandtutorAt Enrico 2012-07-08 startedOnSSSW2012 capitalOf locatedIn Spain near Cercedilla Madrid
shared innovation One Graph, Many Documents Talis Education Tom employedBy locatedIn Italy studentOf bornIn EnglandtutorAt Enrico 2012-07-08 won startedOnSSSW2012 lost Euro2012Final capitalOf locatedIn Spain near Cercedilla Madrid
shared innovationThe RDF Data Model: Triples ObjectSubject Predicate
shared innovationThe RDF Data Model: Triples TalisTom employedBy
shared innovationWhy I RDF• Clear underlying data model• Linkability baked into the data model• Ways to express what the data means• Many different ways to write it (for different use cases)• Very easily parsed (in some cases)
shared innovationIdentifying Things in the Graph• Use URIs• But not any old URIs• HTTP URIs – (almost completely) distributed ownership – anyone (with a credit card) can create/own them – can identify anything – lookup mechanism is baked in
shared innovation HTTP URIs for Things http://www.talis.com/id/companyhttp://tomheath.com/id/me http://example.org/employedBy
shared innovationRetrieving Humans over the Web
shared innovationLinked Data Hands-On Session• Goal: – Give practical experience of working with Linked Data from the Web – Give exposure to different application architectures• Scenario – Building a travel guide application• Tools – Curl, LDSpider, Fuseki, Rapper, Squin