8. Semantics of content and links: implicit (humans)(Tom Heath) The web = the internet + links + documents 3
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12. Limited SEARCH capacity Search for: Football Players who went to the University of Texas at Austin, played for the Dallas Cowboys as Cornerback (Juan F. Sequeda) 5
21. The Modigliani Test Show me all the locations of all the original paintings of Modigliani Daniel Koller (@dakoller) showed that you can find this with a SPARQL query on DBpedia Thanks Richard MacManus - ReadWriteWeb
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23. Results of the Modigliani Test Atanas Kiryakov from Ontotext Used LDSR – Linked Data Semantic Repository Dbpedia Freebase Geonames UMBEL Wordnet Published April 26, 2010: http://www.readwriteweb.com/archives/the_modigliani_test_for_linked_data.php
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25. The Web of Data: why? – encourages reuse – reduces redundancy – maximises its (real and potential) inter-connectedness – enables network effects to add value to data 13
32. The Web of Data: how? – we need to create a standard way of publishing Data on the Web (like HTML for docs) This is the Resource Description Framework (RDF) (a simple example here from Juan F. Sequeda), more next semester!) 15
39. The RDF Data Model Triples subject -> predicate -> object Tom -> worksFor -> Talis Talis -> basedIn -> Birmingham <uri> -> <uri> -> <uri> or "literal"
40. παράδειγμα “Talis is Based Near Birmingham” <http://dbpedia.org/resource/Talis_Group> <http://xmlns.com/foaf/0.1/based_near> <http://sws.geonames.org/3333125/>
43. Databases back up documents THINGS have PROPERTIES: A Book as a Title, an author, … This is a THING: A book title “Programming the Semantic Web” by Toby Segaran, …
44. Data representation in RDF Programming the Semantic Web title author book Toby Segaran isbn 978-0-596-15381-6 publisher name Publisher O’Reilly
46. link the data to other data Programming the Semantic Web title author http://…/isbn978 Toby Segaran isbn 978-0-596-15381-6 publisher name http://…/publisher1 O’Reilly
47. consider the data from Revyu.com hasReview http://…/review1 http://…/isbn978 description reviewer Awesome Book http://…/reviewer name Juan Sequeda
48. start to link data hasReview http://…/review1 http://…/isbn978 Programming the Semantic Web title description sameAs hasReviewer Awesome Book author http://…/isbn978 Toby Segaran http://…/reviewer name isbn 978-0-596-15381-6 Juan Sequeda publisher name http://…/publisher1 O’Reilly
49. Juan Sequeda publishes data too http://juansequeda.com/id http://dbpedia.org/Austin livesIn name Juan Sequeda
50. Let’s link more data hasReview http://…/review1 http://…/isbn978 description hasReviewer Awesome Book http://…/reviewer name Juan Sequeda sameAs http://juansequeda.com/id http://dbpedia.org/Austin livesIn name Juan Sequeda
51. And more hasReview http://…/review1 http://…/isbn978 Programming the Semantic Web title description sameAs hasReviewer Awesome Book author http://…/isbn978 Toby Segaran http://…/reviewer name isbn 978-0-596-15381-6 Juan Sequeda publisher sameAs http://…/publisher1 name O’Reilly http://juansequeda.com/id http://dbpedia.org/Austin livesIn name Juan Sequeda
53. Linked Data Principles Use URIs as names for things Use URIs so that people can look up (dereference) those names. When someone looks up a URI, provide useful information. Include links to other URIs so that they can discover more things.
54. Web as a database Linked Data makes the web exploitable as ONE GIANT HUGE GLOBAL DATABASE!Is there any query language like sql?SPARQL… (next semester)
71. What is a Linked Data application/service? Software system that makes use of data on the Web from multiple datasets and that benefits from links between the datasets
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73. Discover further information by following the links between different data sources: the fourth principle enables this.
74. Combine the consumed linked data with data from sources (not necessarily Linked Data)
75. Expose the combined data back to the web following the Linked Data principles