second-order class

metaclass containing as instances all classes of individuals

Wikidata entity: Q24017414



P1889 different from ... Q16889133 (class) class
P1889 different from ... Q19478619 (metaclass) metaclass
P1889 different from ... Q23958852 (variable-order class) variable-order class
P1889 different from ... Q21146257 (type) type
P1709 equivalent class Url None ???
P31 instance of ... Q24017465 (third-order class) third-order class
P8225 is metaclass for ... Q104086571 (first-order class) first-order class
P6104 maintained by WikiProject ... Q60005226 (WikiProject Ontology) WikiProject Ontology
P5869 model item ... Q189118 (cell type) cell type
P1963 properties for this type ... P1963 (properties for this type) properties for this type
P1963 properties for this type ... P2737 (union of) union of
P1963 properties for this type ... P8225 (is metaclass for) is metaclass for
P1963 properties for this type ... P6104 (maintained by WikiProject) maintained by WikiProject
P279 subclass of ... Q19478619 (metaclass) metaclass
P279 subclass of ... Q23959932 (fixed-order class) fixed-order class
P2559 Wikidata usage instructions Monolingualtext Wikidata:WikiProject Ontology/Modelling ???
P2559 Wikidata usage instructions Monolingualtext A second-order class in Wikidata, e.g., watercraft type (Q16335899), bridge by structural type (Q17644823), or first-order class (Q104086571), is a class all of whose instances are implicitly or explicitly an instance of (P31) first-order class (Q104086571). A class is implicitly a second-order classes if it is a subclass of (P279) another class that is a second-order class, e.g., submarine type (Q121289744) is implicitly a second order class because it is a subclass of (P279) watercraft type (Q16335899). These implicit instance of instance of (P31) statements are not all observable in Wikidata. Before stating that a class is an instance of (P31) second-order class (Q24017414) check that it is actually a second-order class, i.e., that all its instances are classes of individuals. ???

External Ids
P8408KBpedia IDObjectOrientedProgrammingLanguage

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