In my opinion :
Query the answer from the RDF 3-tuples, if no answer ,then try a reasoner.
Use the reasoner to complete knowledge graph off-line to save online query time.
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Actually, Jena is not a reasoner. Why do you answer the question you asked in the title? – Gilles-Antoine Nys May 20 '18 at 09:00
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but jena can be used to reason, jena's java API
. So what reasoner do you use? – pun May 20 '18 at 10:28 -
I prefer Openllet https://github.com/Galigator/openllet – Gilles-Antoine Nys May 20 '18 at 12:33