Automobile (Q1420) had the claims [1]:
*subclass of* motor road vehicle
*instance of* motor road vehicle
That was incorrect. An instance of motor road vehicle is something like
the Peekskill Meteorite Car (Q7756463) [2].
It is generally incorrect when an item has *instance of* and *subclass of*
claims with the same value. I am not aware of a Wikidata constraint
template which can encode that rule. (Off hand I'm not sure how it would
be encoded in OWL, either. Ontology experts: how would we do that?)
If we wanted use both *instance of* and *subclass of* in automobile, then
we would need to do something like:
*subclass of* motor road vehicle
*instance of* motor road vehicle class
In my opinion, *instance of* claims like that are not very useful, because
they simply restate what is directly implied in the *subclass of* claim.
Punning that is not a mere rephrasing can be useful, e.g. Chevrolet Malibu
(Q287723) [3] *"subclass of* mid-size car, *instance of* car model".
See also Markus's comment from September about using *subclass of* and
*instance
of* in the same item, which conveniently also discusses automobiles [4].
Happy Q11269!
Eric
https://www.wikidata.org/wiki/User:Emw
1. https://www.wikidata.org/w/index.php?title=Q1420&oldid=184512429#P279
2. https://www.wikidata.org/wiki/Q7756463
3. https://www.wikidata.org/wiki/Q287723
4.
https://lists.wikimedia.org/pipermail/wikidata-l/2014-September/004649.html
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