Re: [DL-Learner discussion] Cannot use Pellet reasoner in DL-Learner

[Lorenz B. <spo...@st...>]

Hi An,

it is difficult to say what going wrong without having your code or at
least a runnable, minimal example and maybe some error stack trace.

Why do you need a default constructor for the PelletReasoner class? As
far as I know, the class works based on the knowledge sources which are
given by the constructor.

Kind regards,

Lorenz
> Hi all,
>
> I tried to use Pellet reasoner with DL-Learner but could not get success.
> The original Pellet reasoner wrapper class lacks of the default 
> constructor (constructor with no parameter).
> I tried to add a default constructor and the reasoner can be initialised 
> and it can load the ontology successfully.
> However, a null pointer exception occurred when the hasTypeImpl() method 
> is called
> (e.g. by the learning problem component for the coverage/accuracy 
> calculation).
>
> Are there anyone can use this reasoner? I would appreciate for your help 
> so much if you can help me
> to make use of this reasoner in Dl-Learner.
>
> I am trying to use this reasoner because the fast instance checker seems 
> to be very slow when I tried to load
> the ontology in the showering-duration example in DL-Learner repository. 
> It took minutes to load this ontology
> while the Pellet reasoner takes only several seconds (usually less than 
> 10s).
>
> Thanks,
> An.
>
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