Re: [dotNetRDF-bugs] help !

[<tom...@gm...>]

Hello Pilippe

Thank you for your email. Good to hear you like the tool.

The cause of your problem is most likely that your query by default searches only the default graph. If you imported a graph file like Turtle that would have created a Named Graph [1].

You can check a box on the left, which says something about union of graph (don't remember exactly). Or you could modify your query for example by adding a graph pattern

SELECT ?s ?p ?o ?g
{
  GRPAH ?g
  {
    ?s ?p ?o
  }
}

This binds graph names to fourth variable, thus returning quads. For loaded files it should be file://path URI.

Regards,
Tom

[1] http://patterns.dataincubator.org/book/named-graphs.html

January 12 2015 10:50 AM, "Philippe Laublet" <phi...@pa...> wrote: 
> Dear sir
> 
> I have installed the SPARQL GUI. I import a local file and all seems ok . I have the indication of
> the number of triples . No problem
> But when I try a query, i have an answer with the name of variables but no answer. Just the names
> of variables (0 result)
> Even with the more simple request or all others
> 
> SELECT ?s ?p ?ob
> WHERE
> {
> ?s ?p ?ob .
> }
> 
> I am sorry because the tool seems very useful and friendly .
> 
> What happens ?
> 
> best regards
> philippe