Re: [Virtuoso-users] DISTINCT issue

On Tue, 2008-10-21 at 11:37 +0100, Hugh Williams wrote: > Hi Sergio, Hi Hugh, > I would expect "DISTINCT" to work as I used it quite often in SPARQL > queries against Virtuoso. Me too. Works fine with a DISTINCT for whole elements in a SELECT. > Can you provide a test case for us to see this pr

Re: [Virtuoso-users] Aggregate queries using CONSTRUCT

Hello Peter, > > CONSTRUCT { > > > > > > `(select (count(?s)) as ?countS > >where { ?s ?p })` } > > where { ?s1 ?p1 ?o1 } limit 1 > > Just to check I understand... T

Re: [Virtuoso-users] virtuoso as a rest based webservice

Hi Bryan, Virtuoso has a default SPARQL Web service endpoint enabling queries to be executed against the server and returned in various formats including RDF/XML as detailed at: http://docs.openlinksw.com/virtuoso/rdfsparqlprotocolendpoint.html I assume this is what you are looking

Re: [Virtuoso-users] Virtuoso performance for bookmarking?

Hi Brian, Virtuoso is currently being used for hosting the following Semantic Web based projects on the strength of its performance and scalability: DBpedia - http://dbpedia.org/About BIO2RDF - http://bio2rdf.org/ NEUROCOMMONS - http://neurocommons.org/page/Main_Page and others ... One of th

Re: [Virtuoso-users] DISTINCT issue

Hi Sergio, I would expect "DISTINCT" to work as I used it quite often in SPARQL queries against Virtuoso. Can you provide a test case for us to see this problem first hand, either a server instance we can access online or a dataset we can load locally to recreate. The Virtuoso explain f

[Virtuoso-users] virtuoso as a rest based webservice

Hi, I would like to use Virtuoso for returning XML (RDF serialized in XML) data over a rest based interface. Thus I don't need to support rendering to XHTML or anything like that. I would also like to server the XML with an inline stylesheet. Does anyone have any examples of doing this with Virtuo

[Virtuoso-users] Virtuoso performance for bookmarking?

Hi, I am working on a new bookmarking service. My 2 most important parameters are performance and scalability. Any reports on how Virtuoso stacks up on these? Best Regards, Bryan Rasmussen

[Virtuoso-users] DISTINCT issue

Hi, in a experiment I've a dataset with many people (some of then duplicated). I want just to list it, I'm doing something like: SELECT DISTINCT(?name) ?person ?mail WHERE { ?person rdf:type foaf:Person . ?person foaf:name ?name . ?person foaf:mbox_sha1sum ?mail } But DISTINCT doesn't wor

Re: [Virtuoso-users] Aggregate queries using CONSTRUCT

- "Ivan Mikhailov" wrote: > From: "Ivan Mikhailov" > To: "Peter Ansell" > Cc: "Virtuoso Users List" > Sent: Tuesday, 21 October, 2008 3:26:07 PM GMT +10:00 Brisbane > Subject: Re: [Virtuoso-users] Aggregate queries using CONSTRUCT > > Hello Peter, > > First of all, there's a syntax error

Re: [Virtuoso-users] Aggregate queries using CONSTRUCT

Hello Peter, First of all, there's a syntax error in construct pattern. Expressions should be backquoted when they appear in triple patterns as graphs, subjecs, predicates or objects. Construct pattern is a pattern, too, so it should be CONSTRUCT {