How does a semantic reasoner for protegé is made?

How does a semantic reasoner for protegé is made?

By : user2956692
Date : November 22 2020, 10:56 AM
help you fix your problem The task of a reasoner is to produce inferences. Standard reasoning tasks are consistency check, realization, instance check and satisfiability. You can find all these defined in a number of books and articles about description logic.
Protege uses the OWL API to interface to reasoners so they are implementations of OWLReasoner. Not all of them are written in Java (e.g., FaCT++ is written in C++). They are quite complex systems, so describing how to implement one takes chapters - too big for an answer here. I'd recommend exploring the source code of a few of them. Open Source ones, off the top of my head: HermiT, FaCT++, Pellet, JFact, ELK.
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FaCT++ reasoner for OWL Protege

FaCT++ reasoner for OWL Protege

By : lei
Date : March 29 2020, 07:55 AM
wish help you to fix your issue You need to start the reasoner after having selected it. The command is in the same menu.
how to install reasoner for protege 4.x

how to install reasoner for protege 4.x

By : JonasPottie
Date : March 29 2020, 07:55 AM
like below fixes the issue I would recommend a newer version of Protege - at least 4.3.0.
In order to activate the reasoner you ned to select one and then choose 'Start reasoner', in the same menu.
Reasoner infers wrong axioms in protege

Reasoner infers wrong axioms in protege

By : alexei
Date : March 29 2020, 07:55 AM
Does that help You are asserting that the domain of hasLocation is the intersection of Platform and Sensor. This implies that anything for which hasLocation has a value belongs to both of these classes.
If you are trying to say that Platform and Sensor are part of the domain, but are disjoint, you need to define the domain as the union of these two classes (or, depending on what the domain actually is in your setup, that the domain class is a superclass of Platform and Sensor.
Restrictions and Reasoner in Protege

Restrictions and Reasoner in Protege

By : Rishabh
Date : March 29 2020, 07:55 AM
this one helps. In my ontology I have a class for Worker which has some properties like first name . First name is a functional property , but I want to make sure that it exists in every worker individual. , It's the joys of open world reasoning.
person some has_name name
Reasoner in Protege not working with Restrictions/Cardinalities

Reasoner in Protege not working with Restrictions/Cardinalities

By : Udi
Date : March 29 2020, 07:55 AM
wish helps you
I get an error thrown by Hermit reasoner that it is not allowed to set 3 neighbours to Island
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