[Virtuoso-devel] Bug processing SPARQL MINUS?

[Wartik, S. P \Steve\ <sw...@id...>]

Hi,



I’ve encountered a problem using Virtuoso 07.20.3317. I was trying one of the queries in the SPARQL documentation. Section 8.3.1 in SPARQL 1.1 Query Language<https://www.w3.org/TR/sparql11-query/#neg-example-1> says that, given a data set containing:



@prefix : <http://example/> .

:a :b :c .



the result of executing the query:



SELECT *
{
   ?s ?p ?o
   MINUS
     { ?x ?y ?z }
}



should be:



s

p

o

<http://example/a>

<http://example/b>

<http://example/c>





But my Virtuoso server returns no results. Can someone please check whether this is an error in Virtuoso? Thanks!



Steve Wartik

Institute for Defense Analyses

(703) 845-6646

sw...@id...