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A comment on Prefer associative ontologies to hierarchical taxonomies. Parent comment

Re:Prefer associative ontologies to hierarchical taxonomies by wenc on Saturday April 11, 2020 @08:13PM (#22845148)
Yes. For a WWW example, Wikipedia has multiple hierarchies, represented by multiple Categories at the bottom of every page (which in turn can belong to multiple Categories). This permits arbitrary level of hierarchy.
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Re:Prefer associative ontologies to hierarchical taxonomies by dredmorbius on Sunday April 12, 2020 @06:39AM (#22847259)
Wikipedia also does have a nominal overall categorisation, FWIW:

https://en.wikipedia.org/wiki/Wikipedia:Contents/Categories

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