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
>
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-- 
Joshua Taylor, http://www.cs.rpi.edu/~tayloj/

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