By bblfish on Dec 15, 2007
And so does Tim Bray, Greg Papadopoulos, Jonathan Schwartz, Sun Microsystems, and Java. All thanks to the great work of the DBPedia people, a loose network of highly skilled distributed self selected avant garde force de frappe, who are extracting all the metadata possible from Wikipedia and making it available as hyperdata, ready to be linked to. :-)
You can browse their information on the web, or with the Tabulator generic data browser which will merge information it finds into one large graph as you explore it. As a result of this I can now add Tim Bray and James Gosling to my foaf file (), by adding the following N3 statements:
:me foaf:knows [ = <http://dbpedia.org/resource/James_Gosling>; a foaf:Person; foaf:name "James Gosling" ], [ = <http://dbpedia.org/resource/Tim_Bray>; a foaf:Person; foaf:name "Tim Bray" ] .
It is worth looking at how DBPedia works. http://dbpedia.org/resource/James_Gosling is now a Universal Resource Identifier for James Gosling. You cannot fetch James because he is not an information resource, ie, he is not a document, though he is very resourceful, and full of interesting information. You can tell that James is not an information resource because you can't copy him easily. So when you do an HTTP GET on that URI you get the following:
hjs@bblfish:0$ curl -I http://dbpedia.org/resource/James_Gosling HTTP/1.1 303 See Other Date: Sat, 15 Dec 2007 17:57:54 GMT Server: Apache-Coyote/1.1 Vary: Accept,User-Agent Location: http://dbpedia.org/page/James_Gosling Content-Type: text/plain Content-Length: 90
ie you get a redirect to the page about James Gosling. This is because
curl by default asks for the html representation of resources. Had you sepecified that you wanted the machine readable
rdf/xml representation you would get a redirect to another resource:
hjs@bblfish:0$ curl -I -H "Accept: application/rdf+xml" http://dbpedia.org/resource/James_Gosling HTTP/1.1 303 See Other Date: Sat, 15 Dec 2007 18:01:10 GMT Server: Apache-Coyote/1.1 Vary: Accept,User-Agent Location: http://dbpedia.openlinksw.com:8890/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=DESCRIBE+%3Chttp%3A%2F%2Fdbpedia.org%2Fresource%2FJames_Gosling%3E Content-Type: text/plain Content-Length: 210
Here you get a redirect to a SPARQL query to DESCRIBE James Gosling. To get the full content, in N3 try:
hjs@bblfish:0$ curl -L -H "Accept: text/rdf+n3" http://dbpedia.org/resource/James_Gosling
-L flag follows all the redirects...