To configure use of a reasoner with fuseki see
https://jena.apache.org/documentation/fuseki2/fuseki-configuration.html
under the section "Inference".
The reasoners are not graph-aware so the union of your ontology and your
instance data all need to appear in the default graph. Either by loading
them there directly OR by loading them as separate graphs and setting
default union flag.
However, the link you provide to your ontology doesn't match your prose
example in any way at all. In particular it seems to be a mix of skos
and linkml (whatever that is) and I see virtual no OWL in in there.[*]
Though it is a 1.3Mb turtle file so who knows what's lurking. So on the
face of it there's no OWL to reason over and you won't get any useful
results.
My advice would be to isolate a smaller test example of the kind of
reasoning you are trying to do and check that programmatically see
https://jena.apache.org/documentation/inference/index.html#OWLexamples
Then, if it seems like inference does work, you can tackle the separate
problem of setting that up within fuseki.
Dave
[*] In particular there's no use of rdfs:subClassOf. There are 188
owl:inverseOf states but they are applied to things of type
linkml:SlotDefinition which makes no sense at all.
On 03/02/2023 10:16, Yang-Min KIM wrote:
Dear Jena community,
I hope your day is going great.
I have a question about the ontology: we want to request an ontoogy data
A that also import another ontology OWL-B.
e.g.
A includes:
John is Male.
John has a daughter called Monica.
OWL-B includes:
Daughter is subclass of Children. (rdfs:subClassOf)
If X is Male and has Children Y, X is father of Y. (owl:inverseOf)
What I want to query:
Who is Monica's father?
Expected response:
John
To get expected response, Jena needs to include OWL-B then manage
implicit statement. However, I got results by explicit querying only:
Who is John's daughter? -> Monica
I'm sure there is a solution since I see "The OWL reasoner" in
<https://jena.apache.org/documentation/inference/index.html#owl>
Are there additional steps to include Ontology structure? (We are using
Fuseki's API REST)
Is it better to import OWL-B as a default graph or a named graph? and
what if we have several OWL files to import?
P.S. here is an example of our OWL file, BIolink Model, downloadable via
<https://github.com/biolink/biolink-model/blob/master/biolink-model.ttl>
Thank you for your time.
