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4 RDF Gnavi() WWW 4 www

8 Resource Description Framework

20 rdfs:type schema:website schema:about schema:lastreviewed rdfs:label db:fukuoka " "^^xsd:date rdfs:label "Fukuoka city official

rdfs:type schema:website http://city.fukuoka.lg.

22 rdfs:type schema:website schema:about schema:lastreviewed rdfs:label db:fukuoka " "^^xsd:date rdfs:label "Fukuoka city official rdfs:type schema:about schema:lastreviewed rdfs:label rdfs:label schema:website db:fukuoka " "^^xsd:date " List of nurseries in

23 rdfs:type schema:website schema:website schema:about schema:lastreviewed rdfs:label rdfs:label db:fukuoka " "^^xsd:date "Fukuoka city official rdfs:type schema:about schema:lastreviewed rdfs:label rdfs:label db:fukuoka " "^^xsd:date " List of nurseries in " List of nurseries in db:fukuoka rdfs:label schema:about rdfs:label schema:lastreviewed rdfs:type " "^^xsd:date schema:about schema:lastreviewed rdfs:label rdfs:type schema:website rdfs:label "Fukuoka city official

24 " List of nurseries in rdfs:label schema:website rdfs:type rdfs:label schema:lastreviewed " "^^xsd:date rdfs:type schema:about rdfs:label "Fukuoka" schema:lastreviewed rdfs:label rdfs:label rdfs:label db:fukuoka schema:about rdfs:label geo:lat "Fukuoka city official geo:lon " "^^xsd:float "130.4"^^xsd:float DBpedia...

25 lod-cloud.net

28 .rdf

29 <p about= myself" vocab=" typeof="person"> My name is <span property="name">antoine Trouvé</span>, my phone number is <span property="telephone">xxx-xxxx-xxx</span> and my homepage is <a property="url" href=" </p> schema:name Antoine Trouvé myself schema:label schema:url xxx-xxxx-xxx

34 Comparison RDF vs. Relational Relational Database RDF Query language SQL SPARQL Data topology 2D tables Graphs Database technology Relational database Triple store (RDF store, graph store) Data model Relational Model RDF 1.1 Abstract Syntax 34

35 prefix rdfs: < prefix bodic: < SELECT?englishName WHERE { GRAPH bodic:dataset1 {?s rdfs:label "@ja ; rdfs:label?englishname } } FILTER ( lang(?englishname) == en )

36 prefix rdfs: < prefix bodic: < SELECT?englishName WHERE { GRAPH bodic:dataset1 {?s rdfs:label "@ja ; rdfs:label?englishname } } FILTER ( lang(?englishname) == en )

37 prefix rdfs: < prefix bodic: < SELECT?englishName WHERE { GRAPH bodic:dataset1 {?s rdfs:label "@ja ; rdfs:label?englishname } } FILTER ( lang(?englishname) == en )

38 prefix rdfs: < prefix bodic: < SELECT?englishName WHERE { GRAPH bodic:dataset1 {?s rdfs:label "@ja ; rdfs:label?englishname } } FILTER ( lang(?englishname) == en )

39 prefix rdfs: < prefix bodic: < SELECT?s rdfs:label?englishname?englishname WHERE { GRAPH bodic:dataset1 {?s rdfs:label "@ja ; rdfs:label?englishname } } FILTER ( lang(?englishname) == en )

40 prefix rdfs: < prefix bodic: < SELECT?englishName WHERE { GRAPH bodic:dataset1 {?s rdfs:label "@ja ; rdfs:label?englishname } } FILTER ( lang(?englishname) == en )

41 ?s rdfs:label?englishname

42 ?s rdfs:label?englishname

43 prefix rdfs: < prefix bodic: < SELECT?englishName WHERE { GRAPH bodic:dataset1 {?s rdfs:label "@ja ; rdfs:label?englishname } FILTER ( lang(?englishname) == en ) }

45 SELECT DISTINCT?name WHERE { SERVICE < {?s rdfs:label?name } } www

46 SELECT DISTINCT?name WHERE { SERVICE < {?s rdfs:label?name } } www

50 INSERT {?a foaf:friend?b ; foaf:knows?b.?b foaf:knows?a. } WHERE {?b foaf:friend?a }

52 About Vocabulary Depending on the data you hold, you may need various vocabulary You may create your own But someone may have done the job for you! There are some W3C standard vocabularies RDF and RDF Schema (RDFS) geo for geographical data (e.g. longitude / latitude) SKOS, the simple knowledge organization system XSD, data types from the XML standards And some other well-established vocabularies Foaf (Friend of a friend) to describe human relations Schema.org to casually describe misc. resources such as public facilities, websites or drugs (aimed at being a general purpose vocabulary for RDFa and Microdata) Dublin Core to describe bibliographical resources DBPedia, Yago, two general-purpose vocabularies, used for online encyclopedia 52

53 About Vocabulary Depending on the data you hold, you may need various vocabulary You may create your own But someone may have done the job for you! There are some W3C standard vocabularies RDF and RDF Schema (RDFS) geo for geographical data (e.g. longitude / latitude) SKOS, the simple knowledge organization system XSD, data types from the XML standards And some other well-established vocabularies Foaf (Friend of a friend) to describe human relations Schema.org to casually describe misc. resources such as public facilities, websites or drugs (aimed at being a general purpose vocabulary for RDFa and Microdata) Dublin Core to describe bibliographical resources DBPedia, Yago, two general-purpose vocabularies, used for online encyclopedia 53

54 Find a vocabulary on prefix.cc Example of RDFS Used to describe RDF schema (we ll see later) W3C recommandation prefix.cc shows us the ranking of most popular vocabularies 54

55 55

56 We get the turtle version of the vocabulary! 56

57 We get the turtle version of the vocabulary! 57

61 bodic:vehicle a rdfs:class. bodic:car a rdfs:class ; rdfs:subclassof bodic:vehicle.. bodic:plane a rdfs:class ; rdfs:subclassof bodic:vehicle.. data:mycar a bodic:car. data:mycar a bodic:vehicle.

RDF-lecture-01_ key

RDF-lecture-01_ key 1 RDF @JST Linked Open Data RDF SPARQL 2016/10/7 . @prefix : .