26. The apparatus set forth in claim 20 further comprising: an RDF rules table in the relational database management system that contains representations of RDF rules belonging to one or more rule bases, the SQL interpreter additionally causing the results to be obtained from inferred RDF triples that are inferred by applying rules represented in the RDF rules table to the representations in the RDF triples table.
26. The apparatus set forth in claim 20 further comprising: an RDF rules table in the relational database management system that contains representations of RDF rules belonging to one or more rule bases, the SQL interpreter additionally causing the results to be obtained from inferred RDF triples that are inferred by applying rules represented in the RDF rules table to the representations in the RDF triples table. 27. The apparatus set forth in claim 26 wherein: The containing SQL query further includes a specification of at least one of the rule bases; and the applied rules belong to the rule base specified in the rule base specification.