SPARQLの基礎
•
10 likes•5,248 views
The document describes semantic web technologies including SPARQL and Linked Data and provides examples of querying databases like DBpedia using SPARQL to retrieve information about topics such as Mike Oldfield, his album Tubular Bells, and their connections across data sources. Graph patterns and operators are demonstrated that can be used to write SPARQL queries against RDF data.
More Related Content
More from Fumihiro Kato
More from Fumihiro Kato (20)
Recently uploaded
Recently uploaded (20)
SPARQLの基礎
- 3. SPARQL
- 12. A C B D E F H G I K J L M
- 13. A C B D E F H G I K J L M
- 14. A C B D E F H G I K J L M
- 15. A C B D E F H G I K J L M :A ?link1 ?node1 ?node1 ?link2 ?node2
- 16. A like like C B like dislike D dislike dislike E F dislike like H like dislike G like I dislike K dislike like J L dislike M
- 17. A like like C B like dislike D dislike dislike E F dislike like H like dislike G like I dislike K dislike like J L dislike M
- 18. A like like C B like dislike D dislike dislike E F dislike like H like dislike G like I dislike K dislike like J L dislike M :A :like ?node1 ?node1 :like ?node2
- 19. rdfs:label dbpedia-owl:capital dbpedia:Japan dbpedia- owl:City rdf:type dbpedia-owl:coutnry dbpedia- dbpedia:Tokyo dbpprop:birthPlace rdf:type owl:ComicCreator dbpprop:birthPlace rdf:type dbpedia- rdfs:label dbpedia:Kaoru_Mori owl:sameAs owl:Artist owl:sameAs dbpprop:birthdate rdf:type 1978-09-18 rdfs:label foaf:homepage foaf:Person rdfs:label freebase: Мори, Каору http:// morikaoru.blog62.fc2.com
- 20. dbpedia-owl:Capital dbpedia:Japan dbpedia:Tokyo
- 21. PREFIX dbpedia: <http://dbpedia.org/resource/> PREFIX dbpedia-owl: <http://dbpedia.org/ontology/> SELECT ?country WHERE { dbpedia:Tokyo dbpedia-owl:country ?country . } rdfs:label dbpedia-owl:capital dbpedia:Japan dbpedia- owl:City rdf:type dbpedia-owl:coutnry dbpedia- dbpedia:Tokyo dbpprop:birthPlace rdf:type owl:ComicCreator dbpprop:birthPlace rdf:type dbpedia- rdfs:label dbpedia:Kaoru_Mori owl:sameAs owl:Artist owl:sameAs dbpprop:birthdate rdf:type 1978-09-18 rdfs:label foaf:homepage foaf:Person rdfs:label freebase: Мори, Каору http:// morikaoru.blog62.fc2.com
- 23. PREFIX dbpedia: <http://dbpedia.org/resource/> PREFIX dbpedia-owl: <http://dbpedia.org/ontology/> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT ?birthPlace ?label WHERE { dbpedia:Kaoru_Mori dbpedia-owl:birthPlace ?birthPlace . ?birthPlace rdfs:label ?label . } rdfs:label dbpedia-owl:capital dbpedia:Japan dbpedia- owl:City rdf:type dbpedia-owl:coutnry dbpedia- dbpedia-owl:birthPlace rdf:type owl:ComicCreator dbpedia:Tokyo dbpedia-owl:birthPlace rdf:type dbpedia- rdfs:label dbpedia:Kaoru_Mori owl:sameAs owl:Artist owl:sameAs dbpprop:birthdate rdf:type 1978-09-18 rdfs:label foaf:homepage foaf:Person rdfs:label freebase: Мори, Каору http:// morikaoru.blog62.fc2.com
- 25. PREFIX dbpedia: <http://dbpedia.org/resource/> PREFIX dbpedia-owl: <http://dbpedia.org/ontology/> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT ?birthPlace ?label WHERE { dbpedia:Kaoru_Mori dbpedia-owl:birthPlace ?birthPlace . ?birthPlace rdf:type dbpedia-owl:City ; rdfs:label ?label . } rdfs:label dbpedia-owl:capital dbpedia:Japan dbpedia- owl:City rdf:type dbpedia-owl:coutnry dbpedia- dbpedia-owl:birthPlace rdf:type owl:ComicCreator dbpedia:Tokyo dbpedia-owl:birthPlace rdf:type dbpedia- rdfs:label dbpedia:Kaoru_Mori owl:sameAs owl:Artist owl:sameAs dbpprop:birthdate rdf:type 1978-09-18 rdfs:label foaf:homepage foaf:Person rdfs:label freebase: Мори, Каору http:// morikaoru.blog62.fc2.com
- 27. PREFIX dbpedia: <http://dbpedia.org/resource/> PREFIX dbpedia-owl: <http://dbpedia.org/ontology/> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT ?birthPlace ?label WHERE { dbpedia:Kaoru_Mori dbpedia-owl:birthPlace ?birthPlace . ?birthPlace a dbpedia-owl:City ; rdfs:label ?label . FILTER (lang(?label) = “ja”) } rdfs:label dbpedia-owl:capital dbpedia:Japan dbpedia- owl:City rdf:type dbpedia-owl:coutnry dbpedia- dbpedia-owl:birthPlace rdf:type owl:ComicCreator dbpedia:Tokyo dbpedia-owl:birthPlace rdf:type dbpedia- rdfs:label dbpedia:Kaoru_Mori owl:sameAs owl:Artist owl:sameAs dbpprop:birthdate rdf:type 1978-09-18 rdfs:label foaf:homepage foaf:Person rdfs:label freebase: Мори, Каору http:// morikaoru.blog62.fc2.com
- 31. SELECT * WHERE { ?s ?p ?o . } LIMIT 100 OFFSET 100
- 32. : yes / no PREFIX dbpedia: <http://dbpedia.org/resource/> PREFIX dbpedia-owl: <http://dbpedia.org/ontology/> ASK WHERE { dbpedia:Kaoru_Mori dbpedia-owl:birthPlace ?birthPlace . }
- 33. PREFIX foaf: <http://xmlns.com/foaf/0.1/> CONSTRUCT { ?s foaf:name ?name . } WHERE { ?s foaf:name ?name . }
- 34. ( ) DESCRIBE <http://dbpedia.org/resource/Tokyo>
- 35. dbpedia-owl:Artist freebase: a music.producer a freebase: owl:sameAs dbpedia: dbpedia: en.mike_oldfield Mike_Oldfield Virgin_Records freebase: dbpedia-owl: music.producer. recordLabel releases_produced dbpedia-owl: dbpedia-owl: freebase: owl:sameAs artist producer freebase: music.release. m.0328jl5 producer a freebase: dbpedia: dbpedia-owl:Album type.object.name owl:sameAs Tubular_Bells Tubular Bells owl:sameAs bbc_artists: mo:musicbrainz musicbrainz: a a1684a49-feaa-4150-b758- a1684a49-feaa-4150-b758- d9412fc59f12#artist d9412fc59f12.html mo:SoloArtist mo:imdb foaf:name imdb:nm0646131 Mike Oldfield (default-graph)
- 36. http://www.freebase.com http://dbpedia.org dbpedia-owl:Artist freebase: a music.producer a freebase: owl:sameAs dbpedia: dbpedia: en.mike_oldfield Mike_Oldfield Virgin_Records freebase: dbpedia-owl: music.producer. recordLabel releases_produced dbpedia-owl: dbpedia-owl: freebase: owl:sameAs artist producer freebase: music.release. m.0328jl5 producer a freebase: dbpedia: dbpedia-owl:Album type.object.name owl:sameAs Tubular_Bells Tubular Bells owl:sameAs bbc_artists: mo:musicbrainz musicbrainz: a a1684a49-feaa-4150-b758- a1684a49-feaa-4150-b758- d9412fc59f12#artist d9412fc59f12.html mo:SoloArtist mo:imdb foaf:name imdb:nm0646131 Mike Oldfield http://www.bbc.co.uk (default-graph)
- 37. http://www.freebase.com http://dbpedia.org dbpedia-owl:Artist freebase: a music.producer a freebase: owl:sameAs dbpedia: dbpedia: en.mike_oldfield Mike_Oldfield Virgin_Records freebase: dbpedia-owl: music.producer. recordLabel releases_produced dbpedia-owl: dbpedia-owl: freebase: owl:sameAs artist producer freebase: music.release. m.0328jl5 producer a freebase: dbpedia: dbpedia-owl:Album type.object.name owl:sameAs Tubular_Bells Tubular Bells owl:sameAs bbc_artists: mo:musicbrainz musicbrainz: a a1684a49-feaa-4150-b758- a1684a49-feaa-4150-b758- d9412fc59f12#artist d9412fc59f12.html mo:SoloArtist mo:imdb foaf:name imdb:nm0646131 Mike Oldfield http://www.bbc.co.uk (default-graph)
- 38. SELECT * WHERE { GRAPH <http://dbpedia.org> { ?s ?p ?o . } }
- 39. SELECT * WHERE { GRAPH ?g { ?s ?p ?o . } }
- 41. { ex:A ex:like ?tmpNode . ?tmpNode ex:like ?node . } => { ex:A ex:like/ex:like ?node } => { ex:A ex:like{2} ?node } ... => { ex:A ex:like+ ?node } { ex:A (ex:like|ex:love) ?node }
- 42. COUNT, SUM, MIN, MAX, AVG, GROUP_CONCAT, SAMPLE PREFIX dbpedia: <http://dbpedia.org/resource/> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT (COUNT(?label) AS ?count) WHERE { dbpedia:Tokyo rdfs:label ?label . }