* presentation * http://virtuoso.openlinksw.com/whitepapers/relational%20rdf%20views%20mapping.html xmmm: http://www4.wiwiss.fu-berlin.de/bizer/BerlinSPARQLBenchmark/results/index.html#comparison next steps : virtuoso! try : http://www.mkyong.com/tomcat/tomcat-javalangoutofmemoryerror-permgen-space/