On 6/29/12 6:52 AM, Alex wrote:
Trying the following query with wrong syntax:

select ?o from <http://www.heppnetz.de/ontologies/goodrelations/v1.owl> where{filter not exists{?o comment1212 ?x}}

And I get a syntax error: Virtuoso 37000 Error SP030: SPARQL compiler, line 2: syntax error at 'comment1212' before '?x'. Not an internal error.

Is this a good test basis:

PREFIX  rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX  foaf:   <http://xmlns.com/foaf/0.1/>

SELECT ?person
WHERE
{
    ?person rdf:type  foaf:Person .
    FILTER NOT EXISTS { ?person foaf:name ?name }
} limit 10

Against URIBurner instance, you get:
http://linkeddata.uriburner.com/c/JUB4DA .

--

Regards,

Kingsley Idehen 
Founder & CEO
OpenLink Software
Company Web: http://www.openlinksw.com
Personal Weblog: http://www.openlinksw.com/blog/~kidehen
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