How To Enable Sponge?

When a new Virtuoso server is installed, the default security restrictions do not allow SPARQL endpoint users to retrieve remote RDF data. To remove this restriction, the DBA should grant "SPARQL_SPONGE" privilege to "SPARQL" account. If you are the Database Administrator and want to enable this feature, you can perform the following steps:

  1. Go to the Virtuoso Administration Conductor i.e. http://linked.opendata.cz/conductor.
  2. Login as dba user.
  3. Go to System Admin->User Accounts->Roles
  4. Click the link "Edit" for "SPARQL_SPONGE"
  5. Select from the list of available user/groups "SPARQL" and click the ">>" button so to add it to the right-positioned list.
  6. Click the button "Update"
  7. Access again the sparql endpoint in order to be able to retrieve remote data.

To close this help, press or use the "back" button of the browser.