[prepend]

NIEM is much more complex is was trying to have semantic exchange vs this is just cataloging and doesn’t do much with being able to interpret and use data.

NIEM was really complicated to implement, and I think that contributed to limited use.

DCAT is for cataloging and describing datasets and I think is used pretty extensively (I think google was using it when they would scrape and then describe data in their data commons project, among others).