Code System
69 data model standards at the code system layer. Every one confirmed against its steward's own site.
| Standard | Steward | Domain | Access | Modernity |
|---|---|---|---|---|
| AGROVOC | FAO of the United Nations | Agriculture | open | 69.0 Modernizing |
| ATC Classification | WHO Collaborating Centre for Drug Statistics Methodology | Pharma | spec sold | — |
| Basel Convention waste codes | Basel Convention Secretariat / UNEP | Waste | — | — |
| CAIP (Chain Agnostic Improvement Proposals) | Chain Agnostic Standards Alliance | Crypto | — | — |
| CDF / InChI / MOL / SMILES chemical identifiers | IUPAC / Daylight | Chemistry | open | 71.2 Modernizing |
| COICOP / CPC / HS product classifications | UN Statistics Division | Statistics | open | — |
| CPT and HCPCS | American Medical Association / CMS | Healthcare | licence | — |
| CUSIP / SEDOL | CUSIP Global Services / LSEG | Finance | licence | — |
| Cellosaurus | SIB Swiss Institute of Bioinformatics | Medical Biotechnology | spec sold | 49.2 Legacy |
| DTI (Digital Token Identifier) ISO 24165 | DTIF / ANNA | Crypto | — | — |
| Dewey Decimal Classification (DDC) | OCLC | Library | licence | 38.0 Legacy |
| ECLASS | ECLASS e.V. | Manufacturing | licence | — |
| ECLI (European Case Law Identifier) | European Commission / Council of the EU | Legal | open | — |
| EIDR | Entertainment Identifier Registry Association | Media | — | — |
| EU Taxonomy for sustainable activities | European Commission | Sustainability | open | — |
| EuroVoc | Publications Office of the European Union | Government | — | — |
| FIGI (Financial Instrument Global Identifier) | Object Management Group / Bloomberg | Finance | open | — |
| GMDN and EMDN device nomenclature | GMDN Agency / European Commission | Medical Devices | licence | — |
| GND (Integrated Authority File) | Deutsche Nationalbibliothek | Library | open | — |
| Getty Vocabularies (AAT, ULAN, TGN, CONA) | Getty Research Institute | Cultural Heritage | licence | 38.0 Legacy |
| HGVS nomenclature | Human Genome Variation Society | Genomics | open | — |
| Harmonized System (HS) codes | World Customs Organization | Customs | — | — |
| IAB Content / Audience / Ad Product Taxonomies | IAB Tech Lab | Advertising | open | 74.0 Current |
| IANA Time Zone Database | IANA / tz coordinators | Cross Domain | — | — |
| ICD-11 | World Health Organization | Healthcare | open | 85.7 Current |
| ICF (International Classification of Functioning) | World Health Organization | Healthcare | open | 67.6 Modernizing |
| IPTC Media Topics | IPTC | News | — | 46.5 Legacy |
| ISBT 128 | ICCBBA | Medical Biotechnology | licence | — |
| ISIN / CFI / FISN (ISO 6166, 10962, 18774) | ISO / ANNA | Finance | spec sold | — |
| ISO 10383 MIC (Market Identifier Codes) | ISO / SWIFT | Finance | spec sold | 36.6 Legacy |
| ISO 13616 IBAN | ISO / SWIFT | Payments | spec sold | — |
| ISO 20275 Entity Legal Forms | ISO / GLEIF | Finance | spec sold | 50.0 Modernizing |
| ISO 3166 / 4217 / 639 country, currency, language codes | ISO | Cross Domain | spec sold | 29.6 Legacy |
| ISO 80000 quantities and units | ISO / IEC | Cross Domain | spec sold | — |
| ISO 8601 date and time | ISO | Cross Domain | spec sold | — |
| ISO 9362 BIC | ISO / SWIFT | Finance | spec sold | — |
| Iconclass | Henri van de Waal Foundation / RKD | Cultural Heritage | open | — |
| LEI (Legal Entity Identifier) / ISO 17442 | GLEIF | Finance | — | 56.9 Modernizing |
| LOINC | Regenstrief Institute | Healthcare | open | 60.7 Modernizing |
| LanguaL | LanguaL / EuroFIR | Food | — | 44.6 Legacy |
| Library of Congress Classification (LCC) | Library of Congress | Library | open | 43.2 Legacy |
| MLCommons AI Safety / risk taxonomies | MLCommons / NIST AI RMF | AI | — | — |
| Mathematics Subject Classification (MSC) | American Mathematical Society / zbMATH | Mathematics | licence | — |
| MeSH (Medical Subject Headings) | US National Library of Medicine | Healthcare | open | — |
| NAICS / SIC / ISIC / NACE | US Census / UN / Eurostat | Government | spec sold | 44.4 Legacy |
| NCBI Taxonomy (NCBITaxon) | NCBI / OBO Foundry edition | Biology | open | — |
| National Drug Code (NDC) | US Food and Drug Administration | Pharma | — | — |
| O*NET / ESCO occupational taxonomies | US DOL / European Commission | HR | open | 67.9 Modernizing |
| Package URL (purl) | purl-spec community / OpenSSF | Software Supply Chain | open | 79.6 Current |
| RCRA hazardous waste codes | US Environmental Protection Agency | Waste | — | — |
| RxNorm | US National Library of Medicine | Healthcare | open | 72.8 Current |
| SDG Indicator Framework | UN Statistics Division | Development | open | — |
| SMDG codes (container terminals) | SMDG | Logistics | — | 64.6 Modernizing |
| SMPTE Metadata Registry / ST 335 | SMPTE | Media | spec sold | — |
| SNODENT and CDT dental codes | American Dental Association | Dentistry | licence | — |
| SNOMED CT | SNOMED International | Healthcare | licence | 46.7 Legacy |
| SNOMED CT Veterinary Extension | SNOMED International / VTSL | Veterinary | — | — |
| Thema and BISAC subject codes | EDItEUR / BISG | Publishing | licence | 37.7 Legacy |
| UCUM (Unified Code for Units of Measure) | Regenstrief Institute | Healthcare | open | 53.1 Modernizing |
| UDI / GUDID and EUDAMED | US FDA / European Commission | Medical Devices | open | — |
| UMLS Metathesaurus | US National Library of Medicine | Healthcare | open | 70.5 Modernizing |
| UPRN / UK addressing | Ordnance Survey / GeoPlace | Geospatial | open | 65.0 Modernizing |
| Uniclass / OmniClass / MasterFormat | NBS / CSI / Construction Specifications Canada | Construction | — | — |
| Unicode CLDR | Unicode Consortium | Localization | open | 64.5 Modernizing |
| Universal Decimal Classification (UDC) | UDC Consortium | Library | licence | — |
| VIAF (Virtual International Authority File) | OCLC | Library | open | — |
| VeNom Coding | VeNom Coding Group | Veterinary | — | — |
| Waste: European List of Waste (LoW) codes | European Commission | Waste | open | — |
| bSDD (buildingSMART Data Dictionary) | buildingSMART International | Construction | open | 81.1 Current |