Sascha,
(aside)
For my general understanding:
What level of reasoning are you and your student interested in having?
There is a tradeoff between inference expressiveness, performance (CPU
and RAM costs), how much development effect it would take for future
improvements.
On 29/04/2020 08:18, Meckler, Sascha wrote:
Hello Andy and Marco,
the problem also applies to built-in reasoners.
I tried Jena's OWLFBRuleReasoner, OWLMicroFBRuleReasoner and the
RDFSExptRuleReasoner.
(See demo project:
https://github.com/smeckler/inference-demo/blob/master/src/main/resources/fuseki/config.ttl)
Each of which has some forward rules.
If you want to update the inference graph, send updates to the inference
graph.
Andy
Thank you for your help!
Best regards,
Sascha
-----Original Message-----
From: Marco Neumann <marco.neum...@gmail.com>
Sent: Tuesday, April 28, 2020 7:12 PM
To: users@jena.apache.org
Subject: Re: Fuseki inference not triggered with incoming data
so Sascha in short try to use one of the Jena build-in reasoners if this is
not bound to a pellet specific task. if it is you will have to bring this
request up with the pellet maintainers.
On Tue, Apr 28, 2020 at 5:20 PM Andy Seaborne <a...@apache.org> wrote:
On 27/04/2020 09:49, Meckler, Sascha wrote:
Hi *,
I have a question about Fuseki:
We have a Fuseki server with one dataset for actual data and one dataset
with reasoning based on the default union graph (=data from first dataset).
When I insert new data into the first dataset, the inference is not always
triggered. The reasoning dataset updates only at the first time or when
restarting. How can we configurate Fuseki to run the inference every time
that new data is inserted into the first dataset? Or is there a better way
to do this?
For forward rules, I think that the data updates have to go through the
graph with the inference. Forward rules keep state so if you bypass
inference the graph, the state does not get updated.
Backwards rules may notice to some extent - I'm unsure of the details here.
Pellet isn't part of the Apache Jena project.
Andy
I created a small demo project with an easy example and additional
documentation [1]. My student asked on StackOverflow [2] in January but
there was no answer.
Thank you very much for your help!
Best regards,
Sascha
[1] https://github.com/smeckler/inference-demo
[2]
https://stackoverflow.com/questions/59952945/reasoning-in-apache-jena-
fuseki-reload-dataset-or-trigger-inference
______________________________________________________
Sascha Meckler
Data Spaces and IoT Solutions
Fraunhofer-Institut für Integrierte Schaltungen
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---
Marco Neumann
KONA
