It's possible the built in inference is just too slow to be usable in
your case.
If you aren't already using it try the OWLMicro configuration.
If that's still to slow or doesn't cover the inferences you need then
you may need to switch a separate proper DL reasoner such as Pellet.
Dave
On 26/03/18 15:53, Mahsa Roodbari wrote:
---------- Forwarded message ----------
From: *Mahsa Roodbari* <[email protected]
<mailto:[email protected]>>
Date: Mon, Mar 26, 2018 at 2:09 PM
Subject: Problem running sparql queries with inferences
To: [email protected] <mailto:[email protected]>
Cc: Alex Tao <[email protected]
<mailto:[email protected]>>
Hi,
I am facing a problem with querying data when the predicate is a a
variable. This problem occurs when we need to use the inferences rules
imported from OWL reasoner.
Attached you can see my config file. And this is the query I am trying
to run. When I use the user interface to execute this query, it keeps
on spinning and won't return any result. When I stop the server after
a while, I get this error: " Unable to get response from endpoint "
I have run the same query in SnapSparql plugin in Protege and I got
the right results from that.
PREFIX base:
<http://www.semanticweb.org/mahsaro/ontologies/2018/2/untitled-ontology-5#
<http://www.semanticweb.org/mahsaro/ontologies/2018/2/untitled-ontology-5#>>
PREFIX owl: <http://www.w3.org/2002/07/owl#
<http://www.w3.org/2002/07/owl#>>
SELECT ?p ?o
WHERE
{
?p a owl:ObjectProperty .
base:choice_three_tier_client_server_1 ?p ?o.
}
I would appreciate if you could help me with this problem.
Kind regards,
Mahsa Roodbari
