Hello Hugh,
That's very helpful, thank you!
I also found another way by observing how this virtuoso sparql endpoint
works. (http://virtuoso.openlinksw.com/sparql/)
It sends another parameter *should-sponge=soft *besides the sparql query
string, and so I can get the results I want.
Best,
Mai
2014/1/21 Hugh Williams <hwilli...@openlinksw.com>
> Hi Jason,
>
> Passing a Virtuoso Sponger pragma directive in you query to force the
> invocation of the sponger RDF extraction services to extract data from the
> graph URI should work as indicated below:
>
> SQL> sparql select count(*) from <http://purl.oclc.org/NET/ssnx/ssn>
> where { ?s ?p ?o. };
> callret-0
> INTEGER
>
> _______________________________________________________________________________
>
> 0
>
> 1 Rows. -- 178 msec.
> SQL> sparql DEFINE input:grab-all "yes" select count(*) from <
> http://purl.oclc.org/NET/ssnx/ssn> where { ?s ?p ?o. };
> callret-0
> VARCHAR
>
> _______________________________________________________________________________
>
> 767
>
> 1 Rows. -- 2073 msec.
>
> SQL>
>
> Then the data is in the Virtuoso Quad Store and can be queried
> directly/locally:
>
> SQL> sparql select count(*) from <http://purl.oclc.org/NET/ssnx/ssn>
> where { ?s ?p ?o. };
> callret-0
> INTEGER
>
> _______________________________________________________________________________
>
> 767
>
> 1 Rows. -- 167 msec.
> SQL>
>
> See the following link for more information on the sponger directives and
> Virtuoso Sponger service, which not requires the installation of the
> Virtuoso cartridges VAD:
>
>
> http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtSpongerLinkedDataHooksIntoSPARQL
> http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtSponger
>
> Best Regards
> Hugh Williams
> Professional Services
> OpenLink Software, Inc. // http://www.openlinksw.com/
> Weblog -- http://www.openlinksw.com/blogs/
> LinkedIn -- http://www.linkedin.com/company/openlink-software/
> Twitter -- http://twitter.com/OpenLink
> Google+ -- http://plus.google.com/100570109519069333827/
> Facebook -- http://www.facebook.com/OpenLinkSoftware
> Universal Data Access, Integration, and Management Technology Providers
>
> On 20 Jan 2014, at 16:15, Joshua TAYLOR <joshuaaa...@gmail.com> wrote:
>
> I'm not much of a Virtuoso user, but I do see that there's a similar
> URL that might work better. What happens if you use the following
> (note the .owl at the end)?
>
> from <http://www.w3.org/2005/Incubator/ssn/ssnx/ssn.owl>
>
> On Mon, Jan 20, 2014 at 6:19 AM, Jason Mai <trash...@gmail.com> wrote:
>
> Dear all,
>
> I'd like to know if it's possible to do sparql query from a rdf dataset as
> described in
> http://www.w3.org/TR/rdf-sparql-query/#specDataset
>
> I tried it in open-sourced openlink virtuoso sparql endpoint with this
> query:
>
> select *
> from <http://purl.oclc.org/NET/ssnx/ssn>
> where {
> ?s ?p ?o.
> }
>
> The result came out empty.
> I tried and can get correct result from Jena-based endpoint, however I'd
> like to do it with virtuoso for most our data are stored there.
> Could somebody please help me?
>
> Bests,
> Mai
>
>
> ------------------------------------------------------------------------------
> CenturyLink Cloud: The Leader in Enterprise Cloud Services.
> Learn Why More Businesses Are Choosing CenturyLink Cloud For
> Critical Workloads, Development Environments & Everything In Between.
> Get a Quote or Start a Free Trial Today.
>
> http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk
> _______________________________________________
> Virtuoso-users mailing list
> Virtuoso-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/virtuoso-users
>
>
>
>
> --
> Joshua Taylor, http://www.cs.rpi.edu/~tayloj/
>
>
> ------------------------------------------------------------------------------
> CenturyLink Cloud: The Leader in Enterprise Cloud Services.
> Learn Why More Businesses Are Choosing CenturyLink Cloud For
> Critical Workloads, Development Environments & Everything In Between.
> Get a Quote or Start a Free Trial Today.
>
> http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk
> _______________________________________________
> Virtuoso-users mailing list
> Virtuoso-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/virtuoso-users
>
>
>
------------------------------------------------------------------------------
CenturyLink Cloud: The Leader in Enterprise Cloud Services.
Learn Why More Businesses Are Choosing CenturyLink Cloud For
Critical Workloads, Development Environments & Everything In Between.
Get a Quote or Start a Free Trial Today.
http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk
_______________________________________________
Virtuoso-users mailing list
Virtuoso-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/virtuoso-users
