1. Linked data and its role in the semantic web Dave Reynolds, Epimorphics Ltd @der42

2. Roadmap image: Leo Oosterloo @ flickr.com What is linked data? Examples Modelling Access Strengths and weaknesses other topics

3. Linked data intro

8. Example schools information http://education.data.gov.uk/id/school/401874

9. Example schools information http://education.data.gov.uk/id/school/401874 “ Cardiff High School” “ Secondary” “ Cardiff” label phase district

10. Example schools information http://education.data.gov.uk/id/school/401874 “ Cardiff High School” phase district http://statistics.data.gov.uk/id/local-authority-district/00PT “ Cardiff” label school:PhaseOfEducation_Secondary label

11. Example schools information http://education.data.gov.uk/id/school/401874 “ Cardiff High School” phase district http://statistics.data.gov.uk/id/local-authority-district/00PT “ Cardiff” label school:PhaseOfEducation_Secondary http://data.ordnancesurvey.co.uk/id/7000000000025484 label contains ward extent contains parish GML: 310499.4 184176.6 310476.5 ...

12. Example schools information http://education.data.gov.uk/id/school/401874 “ Cardiff High School” phase district http://statistics.data.gov.uk/id/local-authority-district/00PT “ Cardiff” label school:PhaseOfEducation_Secondary http://data.ordnancesurvey.co.uk/id/7000000000025484 label contains ward extent contains parish GML: 310499.4 184176.6 310476.5 ... same as

15. Linked open data cloud: 2007 Linking Open Data cloud diagram, by Richard Cyganiak and Anja Jentzsch. http://lod-cloud.net/

16. Linked open data cloud: 2009 Linking Open Data cloud diagram, by Richard Cyganiak and Anja Jentzsch. http://lod-cloud.net/

17. Linked open data cloud: 2010 Linking Open Data cloud diagram, by Richard Cyganiak and Anja Jentzsch. http://lod-cloud.net/

18. Data.gov.uk – linked datasets and APIs

19. Data.gov.uk visualizations on top of linked data

21. Ordnance survey

22. Environment agency - data, API, visualizations

23. BBC – integration and site design

24. E-commerce and rich snippets Overstock.com Peek-cloppenburg.de

25. Internal use

27. Modelling

29. Modelling – RDF – Resource Description Framework Statement, triple, logical assertion Subject Predicate Object

30. Modelling – RDF Statement, triple, logical assertion Subject Predicate Object some school has a name/label some literal

31. Modelling – RDF Statement, triple, logical assertion Subject Predicate Object http://education.data.gov.uk/id/school/401874 has a name/label “ Cardiff High School”

32. Modelling – RDF Statement, triple, logical assertion Subject Predicate Object http://education.data.gov.uk/id/school/401874 http://www.w3.org/2000/01/rdf-schema#label “ Cardiff High School”

33. Modelling – RDF Statement, triple, logical assertion where school: = http://education.data.gov.uk/id/school/ rdfs: = http://www.w3.org/2000/01/rdf-schema# Subject Predicate Object school:401874 rdfs:label “ Cardiff High School”

34. Modelling – RDF Statement, triple, logical assertion Subject Predicate Object school:401874 rdfs:label “ Cardiff High School” school:401874 ont:districtAdministrative la: 00PT la: 00PT rdfs:label Cardiff

35. Modelling – RDF Statement, triple, logical assertion school:401874 “ Cardiff High School” ont:districtAdministrative la:00PT “ Cardiff” rdfs:label rdfs:label Subject Predicate Object school:401874 rdfs:label “ Cardiff High School” school:401874 ont:districtAdministrative la: 00PT la: 00PT rdfs:label “ Cardiff”

36. Modelling – RDF Statement, triple, logical assertion Subject Predicate Object school:401874 rdfs:label “ Cardiff High School” school:401874 ont:districtAdministrative la: 00PT la: 00PT rdfs:label “ Cardiff” la: 00PT rdfs:label “ Caerdydd”@cy

38. Modelling – RDF RDF/XML syntax <rdf:RDF xmlns:rdf=&quot;http://www.w3.org/1999/02/22-rdf-syntax-ns#&quot; xmlns:ont=&quot;http://education.data.gov.uk/def/school/&quot; xmlns:la=&quot;http://statistics.data.gov.uk/id/local-authority-district/&quot; xmlns:school=&quot;http://education.data.gov.uk/id/school/&quot; xmlns:rdfs=&quot;http://www.w3.org/2000/01/rdf-schema#&quot;> <rdf:Description rdf:about=&quot;http://education.data.gov.uk/id/school/401874&quot;> <rdfs:label>Cardiff High School</rdfs:label> <ont:districtAdministrative> <rdf:Description rdf:about=&quot;http://statistics.data.gov.uk/id/local-authority-district/00PT&quot;> <rdfs:label>Cardiff</rdfs:label> </rdf:Description> </ont:districtAdministrative> </rdf:Description> </rdf:RDF> Subject Predicate Object school:401874 rdfs:label “ Cardiff High School” school:401874 ont:districtAdministrative la: 00PT la: 00PT rdfs:label “ Cardiff”

39. Modelling – RDF Turtle syntax @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix school: <http://education.data.gov.uk/id/school/> . @prefix ont: <http://education.data.gov.uk/def/school/> . @prefix la: <http://statistics.data.gov.uk/id/local-authority-district/> . school:401874 rdfs:label &quot;Cardiff High School&quot;; ont:districtAdministrative la:00PT . la:00PT rdfs:label &quot;Cardiff&quot; . Subject Predicate Object school:401874 rdfs:label “ Cardiff High School” school:401874 ont:districtAdministrative la: 00PT la: 00PT rdfs:label “ Cardiff”

56. Semantic web layer cake

57. Strengths and weaknesses image: spcbrass @ flickr.com

60. Wrapping up image: erika g. @ flickr.com

63. fin.

64. Spare

65. Case study: Local government payments data model publish use