@evan It might even be the same and I just failed to express myself correctly!
I‘m thinking about an Activity Streams vocabulary where you can use Wikidata IDs to describe things. E.g. clarifying that you talk about Berlin in Germany (https://www.wikidata.org/entity/Q64), not the one in Connecticut, USA (https://www.wikidata.org/entity/Q821199).
Or use it to specify authors, composers etc.