An introduction to semantic web and linked data - Inria
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An introduction to semantic web and linked data - Inria
An introduction to Semantic Web and Linked xmlns:inria="http://inria.fr/schema#" > Music
RDF has other syntaxes (Turtle, JSON, Triple)
@prefix rdf: . @prefix inria: .
inria:author ; inria:theme "Music" .
writing rules for RDF triples • the subject is always a resource (never a literal) • properties are binary relations and their types are identified by URIs • the value is a resource or a literal
blank nodes (bnodes)
handy anonymous nodes (existential quantification) there exist a resource such that… { r ; …} Doe author John [surname "Doe" ; firstname "John" . ] ; My Life title "My Life" . http://bu.ch/l23.html
alternatives e.g. title of a book in different languages l’homme qui prenait sa femme pour un chapeau the man who mistook his wife for a hat
title [ a rdf:Alt ; rdf:li "l’homme…"@fr ; rdf:li "the man…"@en . ] .
collection exhaustive and ordered list List first rest monday _:a tuesday _:b wednesday _:c _:d thursday _:e friday _:f saturday _:g sunday nil
dividedIn ( ) .
dc:creator
rdf:label ex:ingredients
ex:weight
rdf:about rdf:type
http://my_domain.org/my_path/my_type
openmodel
• extensible vocabulary based on URIs • anyone can say anything about anything
link to the world
May 2007
April 2008
September 2008
Linking Open ?> http//www.mit.edu/> http//www.mit.edu/ xmlns:rdf ="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns ="http://www.w3.org/2000/01/rdf-schema#> man an adult male person
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