(2014-06-13) Bernard Vatant: The vocabulary of vocabularies is itself linked to others that build on it : it relies on RDFS as well as OWL and Dublin Core for metadata in the latest version. The namespace is keeping track of the first release 1999-02-22. If a vocabulary in LOV pretends it was issued before this date, it's certainly a bug.
(2021-03-07) Ghislain Atemezing: New additions to RDF in 2019 ( rdf:JSON, rdf:direction) without proper metadata (https://w3c.github.io/rdf-star/Minutes/2021-03-05.html#t04). That's not what we can call best practice publishing from W3C vocabulary. Who is to blame? :)