What I make of it
vocabularies.apievangelist.com already carries 996 NAICS industries.
NAICS / SIC / ISIC / NACE
Code System
Government
specification sold
Other government data models
ADMS (Asset Description Metadata Schema)
Metadata Model
BODS (Beneficial Ownership Data Standard)
Information Model
DCAT / DCAT-AP
Metadata Model
EU Core Vocabularies (Person, Business, Location, Criterion)
Ontology / Vocabulary
EuroVoc
Code System
FollowTheMoney (OpenSanctions)
Information Model
OCDS (Open Contracting Data Standard)
Exchange Schema
Popolo / Open Civic Data
Information Model
Project Open Data / data.json
Metadata Model