I have what I believe is a simple question that has, unfortunately, got me
stymied.  How are inconsistencies in an ontology detected in TBC-ME?  In
particular, if I declare two classes to be disjoint and then create a
subClass of each of the classes, I would have thought that the reasoner
would tell me that the ontology was now inconsistent.  The documentation
says:

*Semantic checking*

The built-in OWL DL inferencer OWLIM (or any other inferencer of your
choice integrated with Composer) can be used to check the semantic validity
of your model. Consistency is a check to see whether a particular class can
have members if the class can have members, then it is consistent. After
you run
<http://127.0.0.1:52987/help/topic/org.topbraidcomposer.help/html/Inferences.htm>
an
OWL DL-aware inference engines, inconsistent classes will be made
subclasses of owl:Nothing and also listed in the Inferences View
<http://127.0.0.1:52987/help/topic/org.topbraidcomposer.help/html/Inferences_Panel.htm>
.

I configured the reasoner to run OWLIM.  The note that comes up says that
it doesn't provide all OWL-DL inferences, but I'm assuming it should
provide consistency checking as noted in the documentation.  However,
running the reasoner does not produce the described result.  I even tried
creating instances of my inconsistent subclasses but still got no notice of
inconsistency.

I have run my simple ontology through the Fact++ reasoner in Protégé and
indeed the inconsistencies are detected (although I realize that the
Protégé reasoner is most likely not an OWL-RL-compliant reasoner.)

Any ideas?

Thanks in advance --


charlie

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