The Semantic Desktop, SPARQL and You! - FOSDEM 2010
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The document describes Resource Description Framework (RDF), which is a framework for representing information in the form of subject-predicate-object expressions called triples. It provides examples of using RDF to represent information about a person named John Doe and his dog Rover, including their names and ownership relationship. It also shows how to define an ontology to formally represent classes like Person and Dog as well as properties like hasName and ownerOf.
The Semantic Desktop, SPARQL and You! - FOSDEM 2010
- 1. Providing Genius. RDF "Bubble web"© CC BY-NC-SA Paul Hocksenar / Verbin inc
- 2. Providing Genius. ownerOf john rover - an RDF statement
- 3. Providing Genius. ownerOf john rover Subject Predicate Object
- 4. Providing Genius. <john> <ownerOf> <rover>.
- 5. Providing Genius. <john> <ownerOf> <rover>. Reference
- 6. Providing Genius. <john> <type> <Person>. <rover> <type> <Dog>. <john> <hasName> "John Doe". <rover> <hasName> "Rover". <john> <ownerOf> <rover>.
- 7. Providing Genius. Class Literal <john> <type> <Person>. <rover> <type> <Dog>. <john> <hasName> "John Doe". <rover> <hasName> "Rover". <john> <ownerOf> <rover>. Instance
- 8. Providing Genius. "John Doe" <Person> <hasName> <type> <ownerOf> <john> <rover> <hasName> <type> "Rover" <Dog>
- 9. Providing Genius. <http://example.org/example#john> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/example#Person>.
- 10. Providing Genius. <http://example.org/example#john> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/example#Person>. Or: @prefix example: <http://example.org/example#>. @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> example:john rdf:type example:Person .
- 11. Providing Genius. <http://example.org/example#john> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.org/example#Person>. Or: @prefix example: <http://example.org/example#>. @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> example:john rdf:type example:Person . Or: @prefix example: <http://example.org/example#>. example:john a example:Person .
- 12. Providing Genius. @prefix example: <http://example.org/example#>. example:john a example:Person ; example:hasName "John Doe" ; example:ownerOf example:rover> . example:rover a example:Dog ; example:hasName "Rover" .
- 13. Providing Genius. "Shards" © 2009 CC BY-SA Martin Latter
- 14. Providing Genius. Ontology! People have names People can own some kinds of things Pets can be owned A dog is an pet Dogs can have names
- 15. Providing Genius. Ontology! People have names People can own some kinds of things Pets can be owned A dog is an pet Dogs can have names
- 16. Providing Genius. Ontology! - Names example:Nameable a rdfs:Class. example:hasName a rdf:Property; rdfs:domain example:Nameable; range string .
- 17. Providing Genius. Ontology! People have names People can own some kinds of things Pets can be owned A dog is an pet Dogs can have names
- 18. Providing Genius. Ontology! - Ownership example:Ownable a rdfs:Class . example:ownerOf a rdf:Property; rdfs:domain example:Person; range example:Ownable . example:Pet a rfds:Class ; rdfs:subClassOf example:Ownable ; rdfs:subClassOf example:Nameable .
- 19. Providing Genius. Ontology! - Dogs and People example:Dog a rdfs:Class ; rdfs:subClassOf example:Pet . example:Person a rdfs:Class ; rdfs:subClassOf example:Nameable .
- 20. Providing Genius. "sparkling colored star" © CC BY christmasstockimages.com
- 21. Providing Genius. "John Doe" example:Person example:hasName a example:ownerOf example:john> example:rover example:hasName a "Rover" example:Dog
- 22. Providing Genius. "John Doe" example:Person example:hasName a example:ownerOf example:john> example:rover example:hasName a "Rover" example:Dog
- 23. Providing Genius. ?name example:Person example:hasName a example:ownerOf ?person ?pet a example:Dog
- 24. Providing Genius. ?person a example:Person ; example:hasName ?name ; example:ownerOf ?pet . ?pet a example:Dog .
- 25. Providing Genius. SELECT ?name WHERE { ?person a example:Person ; example:hasName ?name ; example:ownerOf ?pet . ?pet a example:Dog . }
- 26. Providing Genius. SELECT ?name WHERE { ?person a example:Person ; example:hasName ?name ; example:ownerOf ?pet . ?pet a example:Dog . } -> "John Doe"
- 27. Providing Genius. All things RDF and SPARQL: http://www.w3.org/RDF