various fixes (filled in holes), added a switch to trigger following DAWG definition of RDF dataset (default Graphs and no BNodes for Graph names) - default 'off'.
various fixes (filled in holes), added a switch to trigger following DAWG definition of RDF dataset (default Graphs and no BNodes for Graph names) - default 'off'.

Letractively/rdflib,Letractively/rdflib,Letractively/rdflib