Hi,
I'm sorry if I'm asking a basic question here.
How the dbpedia extractor decide the class (<
http://www.w3.org/1999/02/22-rdf-syntax-ns#type>) of certain articles?
For example "http://en.wikipedia.org/wiki/Honda_Integra"; article is
"MeanOfTransportation", "FrontWheelDriveVehicles", "Sedans", "Automobile"
etc.
Did the extractor read from "Infobox" properties?(e.g. body_style) only?
What if the article did not consist of 'infobox'? Only a pure text of
explanation of article. Will it read certain keyword inside the 'abstract'
and 'guess' the class of article? Or, are there more complex mechanism
happened at the engine before it decide the type/class of article?
regards,
sarif
PS : Below is how I check the data from "http://dbpedia.org/sparql";
1) First I check the list of class:
SELECT ?class WHERE {?class a owl:Class} ORDER BY ?class limit 100
result:
...
http://dbpedia.org/ontology/Automobile
http://dbpedia.org/ontology/AutomobileEngine
http://dbpedia.org/ontology/AutomobilePlatform
http://dbpedia.org/ontology/Award
...
2) Then, check the member of one of the class - e.g. Automobile
SELECT ?member
WHERE {?member a <http://dbpedia.org/ontology/Automobile> } limit 100
Result:
...
http://dbpedia.org/resource/Honda_Integra
http://dbpedia.org/resource/Honda_NSX
http://dbpedia.org/resource/Mitsubishi_Starion
http://dbpedia.org/resource/Dodge_Ramcharger
http://dbpedia.org/resource/Plymouth_Fury
.....
3) Next, to see all properties of one of the member
SELECT ?p ?o
WHERE {<http://dbpedia.org/resource/Honda_Integra> ?p ?o }
Result:
..
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/2002/07/owl#Thing
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://dbpedia.org/ontology/MeanOfTransportation
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://dbpedia.org/class/yago/1990sAutomobiles
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://dbpedia.org/class/yago/SportCompactCars
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://dbpedia.org/class/yago/FrontWheelDriveVehicles
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://dbpedia.org/class/yago/Sedans
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://dbpedia.org/ontology/Automobile
....
http://xmlns.com/foaf/0.1/page
http://en.wikipedia.org/wiki/Honda_Integra
...
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