Interface used in RDF to enumerate triples.
Also used by rdfIDataSource::getAllSubjects, then aPredicate,
aObject and aTruthValue are ignored.
@status PLASMA
Callback function for returning query results.
| aSubject, | aPredicate, aObject describe the (sub-)arc |
| ode NS_RDF_STOP_VISIT to stop iterating over the query result. Any error code will stop the iteration as well. |