AndyS questions

AndyS answers

• Apache Jena: riot does not produce output
• create a new ontology with Jena
• use FILTER on graph in SPARQL query
• GROUP BY in SPARQL?
• Are property path depths actually usable in jena sparql?
• What does SELECT FROM DEFAULT actually do?
• How to extract a substring using a regular expression?
• How to know if an RDF graph is lean?
• The DELETE/INSERT operation can be used to remove triples containing blank nodes: how?
• Sparql insert data not working