Hi Kingsley, Kingsley Idehen wrote: > > Note that Virtuoso does support inferencing for subclass and subproperty. > The issue here is that no inferencing rules have been requested or > created during the various data loads into Virtuoso. > > See: http://docs.openlinksw.com/virtuoso/rdfsparqlrule.html
Having this lightweight inference support for subclasses and subproperties would be great. We tried it locally on one of our own machines by loading DBpedia into Virtuoso and creating a rule. However, we ran out of memory while the rule was created (the machine has 4GB RAM - there may have been other tools consuming some of the memory). Do you have an idea how much memory is required to load and run DBpedia in Virtuoso with inference support for subclasses and subproperties? Would it be possible to include inference support in the public SPARQL endpoint? If I understand correctly, there shoudn't be any significant performance drawback for SPARQL queries, which do not explicity ask for inference support (using "sparql define input:inference $ruleset"). Kind regards, Jens -- Dipl. Inf. Jens Lehmann Department of Computer Science, University of Leipzig Homepage: http://www.jens-lehmann.org GPG Key: http://jens-lehmann.org/jens_lehmann.asc ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Dbpedia-discussion mailing list Dbpedia-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
