Re: [Virtuoso-users] SPARQL ASK for graph existance

On Wed, Jan 29, 2014 at 9:07 PM, Paolo Ciccarese wrote: > I am trying to check for the existence of a graph and if I execute this > query in the Conductor > ASK { GRAPH { ?s ?p ?o . } } > returns 'false' when the graph is not there. > > However, if I run the sa

Re: [Virtuoso-users] SPARQL ASK for graph existance

Dear Hugh, I apologize, I sent you the version of the virtjdbc4.jar and not of the virtjdbc3.jar that I am actually using and is the exact same version you listed. I believe I have the most recent versions of all the components. Anything else I should check? Thank you, Paolo On Sun, Feb 2, 201

Re: [Virtuoso-users] SPARQL ASK for graph existance

Hi Paolo, Looking at the version of your JDBC driver it seems quite old, as the latest version is: $ java -jar virtjdbc3.jar OpenLink Virtuoso(TM) Driver for JDBC(TM) Version 3.x [Build 3.62] $ available for download from: http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VOS

Re: [Virtuoso-users] SPARQL ASK for graph existance

Hi Hugh, I am running basically the code of that example, trimmed down to the ASK (the full example run fine though). The ASK in my case is simply to verify the existence of a graph I am using Virtuoso Open Source Edition (Row Store) (multi-threaded) Version 6.1.8.3127-pthreads as of Jan 22 2014 C

Re: [Virtuoso-users] SPARQL ASK for graph existance

Hi Paolo, Have you tried the Example9 program which demonstrates the use of ASK queries in the Jena Provider documentation at: http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtJenaProvider Also, please confirm the version of the Virtuoso server, Jena Provider , Jena Fram

[Virtuoso-users] SPARQL ASK for graph existance

I am trying to check for the existence of a graph and if I execute this query in the Conductor ASK { GRAPH { ?s ?p ?o . } } returns 'false' when the graph is not there. However, if I run the same query with Jena and the Virtuoso Jena Provider I always get back