What I make of it
The open-data catalog model. CKAN is in store but DCAT is not.
DCAT / DCAT-AP
Metadata Model
Government
openly published
DCAT is an RDF vocabulary designed to facilitate interoperability between data catalogs published on the Web. This document defines the schema and provides examples for its use....
Other government data models
ADMS (Asset Description Metadata Schema)
Metadata Model
BODS (Beneficial Ownership Data Standard)
Information Model
EU Core Vocabularies (Person, Business, Location, Criterion)
Ontology / Vocabulary
EuroVoc
Code System
FollowTheMoney (OpenSanctions)
Information Model
SIC / ISIC / NACE (industry classifications other than NAICS)
Code System
NAICS (North American Industry Classification System)
Code System
OCDS (Open Contracting Data Standard)
Exchange Schema
Popolo / Open Civic Data
Information Model
Project Open Data / data.json
Metadata Model