I don't think the SPIN API will work easily with a newer version of
Jena. But your problem seems to not even require SPIN to debug, so you
could start with a small Jena application that executes the query.
Holger
On 5/24/2012 17:15, NVandenBossche wrote:
Hi Peter,
thanks for your reply.
I am using Jena 2.6.4. Should it work with that version?
I will try the latest version later today and I will post my findings
here.
Nicolas
On Thursday, May 24, 2012 12:49:59 AM UTC+2, Peter Ansell wrote:
What version of Jena are you using with SPIN-API? MINUS comes from
the
SPARQL 1.1 Query draft so it may be handled differently across
different recent versions of Jena.
Peter
On 23 May 2012 21:31, NVandenBossche <[email protected]
<mailto:[email protected]>> wrote:
> Hello,
>
> I have made a SPIN rule template for the following SPARQL query
(using
> http://spinservices.org ):
>
>>> PREFIX policy:
>>> <http://www.adaptiveprivacy.com/ontologies/2012/2/policy.owl#
<http://www.adaptiveprivacy.com/ontologies/2012/2/policy.owl#>>
>>>
>>> CONSTRUCT {
>>>
>>> ?userEntity policy:authorisation policy:Authorisation1 .
>>>
>>> }
>>>
>>> WHERE {
>>>
>>> {
>>>
>>> ?userEntity policy:friendOf
>>> <http://dbpedia.org/resource/Barack_Obama
<http://dbpedia.org/resource/Barack_Obama>> .
>>>
>>> MINUS {
>>>
>>> ?userEntity policy:sameEntityAs
>>> <http://dbpedia.org/resource/The_Black_Keys
<http://dbpedia.org/resource/The_Black_Keys>> .
>>>
>>> } .
>>>
>>> }
>>>
>>> UNION
>>>
>>> {
>>>
>>> ?userEntity policy:friendOf
>>> <http://dbpedia.org/resource/Paramore
<http://dbpedia.org/resource/Paramore>> .
>>>
>>> MINUS {
>>>
>>> ?userEntity policy:sameEntityAs
>>> <http://dbpedia.org/resource/The_Black_Keys
<http://dbpedia.org/resource/The_Black_Keys>> .
>>>
>>> } .
>>>
>>> } .
>>>
>>> }
>
>
> I have a Jena Model that contains both the triples
> "<http://dbpedia.org/resource/The_Black_Keys
<http://dbpedia.org/resource/The_Black_Keys>>
> policy:sameEntityAs <http://dbpedia.org/resource/The_Black_Keys
<http://dbpedia.org/resource/The_Black_Keys>>" and
> "<http://dbpedia.org/resource/The_Black_Keys
<http://dbpedia.org/resource/The_Black_Keys>>
> policy:friendOf <http://dbpedia.org/resource/Barack_Obama
<http://dbpedia.org/resource/Barack_Obama>>", but when I
> apply this rule with
"<http://dbpedia.org/resource/The_Black_Keys
<http://dbpedia.org/resource/The_Black_Keys>>" as the
> ?userEntity value, the triple in the construct part of the query
get
> constructured.
>
> I was actually expecting that the MINUS clause would eliminate the
> construction...
>
> Can anyone tell me what the problem is here? I'm not sure, but
I'm expecting
> it has something to do with the UNION clause, even though that
doesn't make
> much sense.
>
> Thanks in advance,
>
> Nicolas
>
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