Am 09.01.2017 um 11:16 schrieb Peter F. Patel-Schneider:
Although there is no formal problem here, care does
have to be taken when
modelling entities that are to be considered as both classes and non-classes
(or, and especially, metaclasses and non-metaclass classes). It is all too
easy for even experienced modellers to make mistakes. The problem is worse
when the modelling formalism is weak (as the Wikidata formalism is) and thus
does not itself provide much support to detect mistakes. The problem is even
worse when the modelling methodology often does not provide much description
of the entities (as is the case in Wikidata).
That's what I meant by "problematic". I did not mean to say it's *wrong*
per se.
--
Daniel Kinzler
Senior Software Developer
Wikimedia Deutschland
Gesellschaft zur Förderung Freien Wissens e.V.