(Q23958852)
English
variable-order class
abstract entity representing classes whose instances may be classes of different orders or even non-classes
Statements
A variable-order class in Wikidata, e.g., class (Q16889133) or variable-order class (Q23958852), is a class that is not a fixed-order class, e.g., one whose instances can include both first-order classes and second-order classes. There are only a few natural variable-order classes. Before stating that a class is an instance of (P31) variable-order class (Q23958852) check that it is actually a variable-order class, e.g., that it can contain both classes and non-classes. (English)
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