SPARQL Endpoint

The URL for the machine readable endpoint as provided by OpenLink Virtuoso is

This page provides:

  • a basic interface to test SPARQL queries
  • examples for typical use cases

The SPARQL endpoint can be queried via curl as follows:

Submit the query stored in the file query.rq (no need to escape the content).

curl --data-urlencode "query@query.rq"
curl -H "Accept: text/csv" --data-urlencode "query@query.rq"

For more examples and formats check Bob DuCharme's weblog


Enable Virtuoso's inference mode (for BioKB ontology)