Friday, 15 March 2013

rdf - DBpedia subclasses of ship -


I have a simple question about DBipedia, I want to get all the subclasses. I have tried: 

  Select the difference? Type WHERE {? Type rdfs: subClassOf dbpedia-owl: ship}   
  
 The result is empty. If I try:  
  choose DISTINCT? Type? Y WHERE {? Type? Y dbpedia-owl: Ship}   
  
 I get sub-classes, but I do not know why the first query does not work.   
 
 
 I do not see any subclass in the results of your second query. It seems that ? There are mostly bindings for  rdf: type . Actually, there are only two results in the following query.  
  Is Different Select? Y where {? type? Y dbpedia-owl: ship}   
  
  y http://www.w3.org/1999/02/22-rdf-syntax-ns #type http://www.w3.org/2000/01/rdf-schema#domain   
 There is no sub category of  Ship  in DBPDA ontology , And you will see that  Ship , along with some other classes, has subclasses of  MeanOfTransportation , but none of these is sub-classes.   

 








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