Each dataset is through its URN definition associated with a platform. There exists a model definition (com.linkedin.dataplatform.DataPlatformInfo.pdsc). I believe this dataplatform model is currently not used. Was the idea to have data platform as an entity along with the other 3 entities (dataset, user, userGroup)? I can imagine that information about the platform where datasets are stored might be interesting…

Yes. We actually have data platform as an entity inside of LinkedIn and stored a small amount of static metadata against it.