Resource Description Framework (RDF), a W3C standard, is the foundation of several technologies for modeling distributed
knowledge and is meant to be used as the basis of the Semantic Web. This site serves as a starting point for getting to know RDF. Various RDF resources are collected on the pages linked to the left.
If you're new to RDF, - Read the Quick Intro to learn
what RDF is and why it's a useful method for modeling and sharing
distributed information.
- Or dive into the In-Depth Introduction
to learn the specifics of RDF.
See RDF in 30 Seconds Press Next above to continue |
RDF was designed initially for metadata:
<http://www.rdfabout.net>
dc:title "rdf:about" ;
dc:description "A website about RDF." .
But wait, there's more. Press Next... |
RDF isn't limited to metadata. It can be used to describe
this site as well as its author:
<http://www.rdfabout.net>
dc:title "rdf:about" ;
dc:description "A website about RDF." ;
dc:creator <http://taubz.for.net/#Me> .
<http://taubz.for.net/#Me>
foaf:name "Joshua Tauberer" ;
foaf:mbox <mailto:tauberer@for.net> ;
foaf:currentProject <http://www.govtrack.us>,
<http://www.rdfabout.net> ;
foaf:schoolHomepage <http://www.upenn.edu> .
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But wait, isn't RDF XML? It's so much more than XML that it's not even XML anymore. (Just press Next...) |
So what *is* RDF? RDF models knowledge. |
:Earth a :Planet .
:Planet rdfs:subClassOf :CelestialBody .
:Earth :revolvesAround :TheSun .
Above: Knowledge about the universe. Below: Knowledge about your product line.
:Ford :makes :Volvo .
:Ford :basedIn :UnitedStates .
:VolvoS60 a :Volvo .
:VolvoS60 :cylinders 5 .
:VolvoS60 :comesWith :NavigationSystem .
:VolvoS60 :subType [ :code "S60 R" ; :horsePower 300 ] .
:VolvoS60 :subType [ :code "S60 T5" ; :horsePower 257 ] .
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The query:
SELECT ?product ?code ?hp WHERE {
?company :basedIn :UnitedStates .
?company :makes ?product .
?product :subType [ :code ?code ; :horsePower ?hp ].
}
"Find me the names and horsepower for all cars
made by American companies." The output:
:VolvoS60 "S60 R" "300" .
:VolvoS60 "S60 T5" "257" .
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