by Ciro Santilli (@cirosantilli, 34)
They have a tutorial at: jena.apache.org/tutorials/sparql.html
Once you've done the Apache Jena CLI tools setup we can query all users with Full Name (FN) "John Smith" directly fom the rdf/vcard.ttl Turtle RDF file with the rdf/vcard.rq SPARQL query:
sparql --data=rdf/vcard.ttl --query=rdf/vcard.rq
and that outputs:
---------------------------------
| x                             |
=================================
| <http://somewhere/JohnSmith/> |
---------------------------------

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  1. Apache Jena
  2. SPARQL implementation
  3. SPARQL
  4. Semantic triple
  5. Resource Description Framework
  6. Knowledge graph
  7. Ontology
  8. Machine learning company
  9. Machine learning
  10. Computer
  11. Information technology
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