Il 12/04/2012 01:18, Paul A. Houle ha scritto: > We've cracked the code of the Freebase quad dump and produced > what we believe is the first correct conversion of Freebase into > industry-standard RDF. > > http://basekb.com/
I'm just downloading the KB. I cannot wait to see it in action! Meanwhile, what is the difference between the KB I'm downloading and the Freebase data dumps (http://download.freebase.com/datadumps/)? What about a simple conversion between MQL and SPARQL (https://www.google.com/#hl=en&sclient=psy-ab&q=mql+to+sparql&oq=mql+to+sparql&aq=f&aqi=&aql=&gs_l=hp.3...2316l2316l1l2367l1l1l0l0l0l0l0l0ll0l0.frgbld.&pbx=1&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.,cf.osb&fp=be30a96db1145851&biw=1600&bih=1048)? Paul, a little typo in the documentation at http://basekb.com/docs/using.php: "is is inexpensive to add a large amount of RAM [...]" --> "it is [...]" Are you sure that the right magic number for MaxCheckpointRemap is 4500000 in your case? Here http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtRDFPerformanceTuning they say: "Also, if running with a large database, setting MaxCheckpointRemap to 1/4th of the database size is recommended. This is in pages, 8K per page." Here http://www.openlinksw.com/dataspace/dav/wiki/Main/VirtConfigScale they say for DBpedia the value is set to 80000. cheers, roberto > > By installing :BaseKB into any market-leading triple store, you > can query Freebase with the powerful SPARQL 1.1 language -- you can get > back as many query results as you want and not be afraid that your > queries will time out. :BaseKB is also compatible with a wide range of > reasoners ranging from RDFS and OWL to SPIN, RIF and first-order logic. > > The early access release of :BaseKB will be used to support the > basekb-tools open source project > > http://code.google.com/p/basekb-tools/ > > basekb-tools will include a test suite and a system that rewrites > RDF statements and SPARQL queries to replicate the name-resolving > capabilities of graphd, the database behind Freebase. Once > basekb-tools is ready, it will be all the easier to write queries > against :BaseKB, and :BaseKB will reach "generally available" status. > > ------------------------------------------------------------------------------ > Better than sec? Nothing is better than sec when it comes to > monitoring Big Data applications. Try Boundary one-second > resolution app monitoring today. Free. > http://p.sf.net/sfu/Boundary-dev2dev > _______________________________________________ > Dbpedia-discussion mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Dbpedia-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
