@spatialists If adopted by whom?
The @w3c and the #OpenGeospatialConsurtium have long produced standards for meta-data.
In 2023 the #OGC formed a Special Working Group to maintain #GeoDCAT. This in the wake of the #GeoDCAT-AP specification born within #INSPIRE.
https://www.ogc.org/standards-working-gr/geodcat-swg-geodcat-swg/