Re: Issue With Parsing Variables in a nested BNode of N3

Sat, 15 Jan 2011 11:53:44 -0800 


On 13/01/11 17:24, Osmun, Taylor wrote:

Hi All,

As the subject name says, I am having problems parsing variables in a nested 
BNode of N3. The reasoning engine Euler (http://eulersharp.sourceforge.net/) 
successfully parses the following subject, but Jena does not.

:ClinicalProblemA03
      :hasReference        [rdf:type :Reference; :applyTo ?anyone; :referTo 
:ClinicalProblemB05];
      :isLinkedToOntology  true.

The error returned to me is:
Exception in thread "main" com.hp.hpl.jena.n3.turtle.TurtleParseException: 
[123, 64] : Error: Object is not a URI, blank node or literal

Any help is greatly appreciated here.



You have ":applyTo ?anyone" -- ?anyone is a variable.


You can only parse RDF into a graph and variables aren't in RDF.  N3 
goes beyond RDF in several ways (variables, graph literals) and Jena is 
an RDF toolkit.


        Andy


Thanks!
Taylor O.






















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