6. The method set forth in claim 5 wherein: the relational database system includes one or more optimization objects for optimizing queries on the RDF triples table; and in the step of obtaining results, the relational database management system uses the optimization objects to optimize the query on the RDF triples table.
6. The method set forth in claim 5 wherein: the relational database system includes one or more optimization objects for optimizing queries on the RDF triples table; and in the step of obtaining results, the relational database management system uses the optimization objects to optimize the query on the RDF triples table. 9. The method set forth in claim 6 wherein: the queries include self-joins on rows from the RDF triples table; and the query optimization objects include a materialized view of a self-join on the RDF triples table.