Hi Roberto,
Note, there is a later Virtuoso snapshot build available from the following FTP
server location:
ftp://download.openlinksw.com/support/vos/virtuoso-opensource-6-20110308.tar.gz
I would recommend you upgrade to this version and retry if not already running
this.
The Virtuoso SPARQL endpoint does provide and option to serialize results as
RDF/XML that you could trying using, see:
http://docs.openlinksw.com/virtuoso/rdfsparql.html#rdfsparqlprotocolendpoint
To use the virtjdbc4.jar, simply include it in your classpath rather then using
the virtjdbc3.jar, when compiling and running the program ...
Best Regards
Hugh Williams
Professional Services
OpenLink Software
Web: http://www.openlinksw.com
Support: http://support.openlinksw.com
Forums: http://boards.openlinksw.com/support
Twitter: http://twitter.com/OpenLink
On 24 Mar 2011, at 13:37, Roberto García wrote:
> Dear all,
>
> I'm experiencing problems when serialising graphs managed by the
> latest available version of Opensource Virtuoso. The graph contains
> many blank nodes and when a take a look at the serialisation produced
> by dump_one_graph I see triples like:
>
> <> rdf:type owl:Class .
> <> rdf:type owl:Restriction .
>
> Is it possible to dump a graph using another serialisation like
> RDF/XML in order to overcome this?
>
> I don't know if this is a related issue with the strange behaviour I'm
> experiencing when loading a complex OWL ontology [1] into a "schema"
> graph used for reasoning. When I do that and query the base graph
> (using define input:inference the previous schema graph) I get
> different kinds of exceptions referring to error Tag 0, Tag 248, etc.
>
> I'm sending this SPARQL queries to Virtuoso through the Jena connector
> available at [2] and ARQ 2.8.6. By the way, how can I make it work
> with virtjdbc4.jar instead of virtjdbc3.jar?
>
> Best,
>
> Roberto García
> http://rhizomik.net/~roberto
>
> [1] http://rhizomik.net/ontologies/2009/09/copyrightonto.owl
> [2] http://ods.openlinksw.com/dataspace/dav/wiki/Main/VOSDownload
>
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