PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • However, HASH JOIN does not require any special order, which means it can use a table scan, index fast full scan and any other methods to get the records all at once, while MERGE JOIN need either to sort the records (which is obviously slow) or to traverse the index with the subsequent key lookups (which is not fast too).
http://www.w3.org/ns/prov#wasQuotedFrom
  • explainextended.com