# The standards we keep, and the ones we write. The Org. AI Foundation's register of standards. Other people's records, quoted as published and credited, beside the six standards we write ourselves. [Browse the register](https://standards.org.ai/#register) · [Get the data on GitHub](https://github.com/dot-org-ai/standards.org.ai) Each book is a collection, as tall as its rows; each line is ten times the one below. 627,561 rows, from CPT's 10 to UNSPSC's 183,288. In amber, the 6 standards we write, set apart from the scale. Rows held for each collection on the register | Collection | Section | Held | Rows | | --- | --- | --- | --- | | O*NET | Work | The whole standard | 133,288 | | APQC PCF | Work | The whole standard | 30,987 | | BLS | Work | Part of the standard | 3,447 | | Advance CTE | Work | The whole standard | 3,978 | | ISCED | Work | The whole standard | 137 | | CEDS | Work | Part of the standard | 158 | | CASE | Work | Part of the standard | 53 | | NAICS | Made and sold | The whole standard | 2,142 | | NAPCS | Made and sold | The whole standard | 5,362 | | UNSPSC | Made and sold | The whole standard | 183,288 | | GS1 | Made and sold | The whole standard | 8,860 | | eCl@ss | Made and sold | Part of the standard | 54 | | ETIM | Made and sold | Part of the standard | 100 | | Schema.org | Made and sold | The whole standard | 3,040 | | ICD-10-CM | Health | The whole standard | 98,208 | | HCPCS Level II | Health | The whole standard | 7,907 | | NDC | Health | Part of the standard | 10,000 | | NPI provider taxonomy | Health | The whole standard | 883 | | HL7 FHIR | Health | The whole standard | 127 | | SNOMED CT | Health | Part of the standard | 20 | | RxNorm | Health | Part of the standard | 16 | | LOINC | Health | Part of the standard | 13 | | CPT | Health | Part of the standard | 10 | | ISO 20022 | Money and paperwork | The whole standard | 657 | | LEI | Money and paperwork | Part of the standard | 1,123 | | ISIN | Money and paperwork | Part of the standard | 120 | | MCC | Money and paperwork | The whole standard | 1,010 | | BIC | Money and paperwork | Part of the standard | 254 | | X12 | Money and paperwork | The whole standard | 1,298 | | UN/EDIFACT | Money and paperwork | Part of the standard | 207 | | EANCOM | Money and paperwork | The whole standard | 278 | | Peppol | Money and paperwork | The whole standard | 236 | | ISO 3166 · 4217 · 639 | The lists everyone quotes | The whole standard | 915 | | UN/LOCODE | The lists everyone quotes | The whole standard | 120,807 | | UN M49 | The lists everyone quotes | Part of the standard | 29 | | IANA time zone database | The lists everyone quotes | The whole standard | 547 | | W3C | The lists everyone quotes | The whole standard | 2,077 | | Census Bureau | Government registers | The whole standard | 4,148 | | SEC | Government registers | The whole standard | 1,095 | | USITC | Government registers | Part of the standard | 219 | | GSA | Government registers | Part of the standard | 228 | | SBA | Government registers | Part of the standard | 32 | | USPTO | Government registers | Part of the standard | 203 | ## Work If it is a list of jobs, of the steps inside them, or of how you train for them, it is here. 7 standards, 3 held in part A careers adviser wants to know where the task list on a job page came from. She reads one row. O*NET, the U.S. Labor Department's database, version 30.0, the folder we loaded. Not a summary of it, not our reading of it, not a number we worked out. The same words the department published, and the name of the file they came out of. If she wants to check us she now knows exactly what to download. 1. **O*NET**: Every U.S. occupation, its tasks, its skills, its tools. The whole standard. Feeds occupations · loaded db_30_0_text, the O*NET database version 30.0. Public domain, a U.S. Government work. 2. **APQC PCF**: Every process a business runs, named the same way across industries. The whole standard. Feeds process · Process Classification Framework 7.4 Cross-Industry, plus the industry frameworks at 7.2.1 and 7.2.2. APQC membership or purchase; the framework file itself grants a perpetual royalty-free licence with attribution to APQC and IBM. 3. **BLS**: How many people hold each job, and what each pays. Part of the standard. Feeds occupations and industries · Occupational Employment Statistics, May 2024; the projections matrix on 2022 NAICS and 2018 SOC. Public domain. One large series file is documented here and has not been decoded. 4. **Advance CTE**: Which course of study leads to which job. The whole standard. Feeds skills and courses · Framework Crosswalk, September 2025. Free with attribution. 5. **ISCED**: UNESCO's levels of education and its fields of study. The whole standard. Feeds education · ISCED 2011 for the levels, ISCED-F 2013 for the fields. UNESCO. 6. **CEDS**: The U.S. common vocabulary for school data. Part of the standard. Feeds education · no version stated. A sample of its elements, not the set it publishes. 7. **CASE**: The format for publishing a set of learning standards. Part of the standard. Feeds education · no version stated. The frameworks and the types, and none of the competencies underneath them. ## Made and sold If it is a way of naming what a business makes, buys or ships, it is here. 7 standards, 2 held in part A buyer is told a supplier's catalogue is GS1 ready, and does not know what that would mean. One row tells her GS1 is three different things with three different dates: a product classification as of May 2025, an event standard at 2.0.1, and a web vocabulary at 1.17. She can now ask the supplier which one, which is the real question, and the row got her there without a single badge. 1. **NAICS**: How North America names its industries. The whole standard. Feeds industries · NAICS 2022. Public domain. 2. **NAPCS**: The products those industries sell. The whole standard. Feeds products · NAPCS 2022. Public domain. 3. **UNSPSC**: One code for anything a business buys. The whole standard. Feeds products · no version stated; the download requires registration. The largest collection we hold. 4. **GS1**: What a product is, where it went, and the words for both. The whole standard. Feeds products and logistics · product classification as of May 2025, with the November 2024 network release beside it; the event standard at 2.0.1; the web vocabulary at 1.17. GS1 General Specifications licence, free for members. 5. **eCl@ss**: The European classification for industrial and technical products. Part of the standard. Feeds products · no version stated. The forty-nine segments at the top, and none of the forty thousand classes its own documentation says sit underneath them. 6. **ETIM**: The classification electrical wholesalers use. Part of the standard. Feeds products · no version stated. Eighty example classes out of the several thousand it publishes. 7. **Schema.org**: The vocabulary the web uses to describe things to machines. The whole standard. Feeds schema · no version stated. CC BY-SA 3.0. Our own superset of Schema.org, schema.org.ai, is under [Our standards](https://standards.org.ai/#ours). ## Health If a clinic, a pharmacy or an insurer has to write it on a form, it is here. 9 standards, 5 held in part A hospital analyst is checking whether the diagnosis codes behind an answer page are current. The row says fiscal year 2026, and says what that means: 1 October 2025 to 30 September 2026. One row down she learns we hold ten thousand drug products out of a hundred and thirty-five thousand, because that is the sample we took. She now knows one of these is safe to rely on and the other is not, and she found that out in eleven seconds. 1. **ICD-10-CM**: Every diagnosis a U.S. clinician can write down. The whole standard. Feeds health · fiscal year 2026, which runs 1 October 2025 to 30 September 2026. Public domain. 2. **HCPCS Level II**: The codes for supplies and services a doctor bills for. The whole standard. Feeds health · January 2026. Public domain, from CMS. 3. **NDC**: The FDA's directory of finished drug products. Part of the standard. Feeds health and products · downloaded 5 December 2025. Ten thousand products out of the hundred and thirty-five thousand the directory holds. We took a sample. 4. **NPI provider taxonomy**: The code that says what kind of clinician someone is. The whole standard. Feeds health and occupations · version 25.1, released 1 July 2025. Public use, maintained by NUCC. 5. **HL7 FHIR**: The shape of a health record moving between two systems. The whole standard. Feeds health · R5, version 5.0.0. CC0. The resources and the datatypes. 6. **SNOMED CT**: Clinical terms. Part of the standard. Feeds health · the top-level hierarchy only. The full set needs a licence from SNOMED International and we do not hold one. 7. **RxNorm**: Normalised drug names. Part of the standard. Feeds health · the monthly release, October 2025. Free to use. The term types, and none of the drugs under them. 8. **LOINC**: The identifiers for lab results and measurements. Part of the standard. Feeds health · 2.81, released 12 August 2025. Its axes and its categories, and none of its codes. Use is governed by the LOINC licence agreement. 9. **CPT**: The codes for medical procedures. Part of the standard. Feeds health · category information only. The codes are the AMA's and need a licence we do not hold. Two of these need a licence we do not hold: SNOMED CT and CPT. We hold the parts their publishers make public, and the rows say which. ## Money and paperwork If it identifies who is paying, or it is the message that carries the order, it is here. 9 standards, 4 held in part A payments engineer wants the merchant category code list and wants to know whose it is. The row names ISO 18245:2023, and names ISO TC68 and the card networks as the ones who maintain it. We are neither, and the row does not pretend otherwise. What we are is the place that copied it and wrote down the date. That is a smaller claim than most pages about standards make, and it is the one we can keep. 1. **ISO 20022**: The message one bank sends another. The whole standard. Feeds finance · no version stated. The message catalogue. ISO TC68 maintains it; SWIFT holds the registry. 2. **LEI**: The twenty-character code that says which company this is. Part of the standard. Feeds business · no version stated. The registration authorities. GLEIF maintains it. 3. **ISIN**: The code for a security. Part of the standard. Feeds finance · no version stated. The national numbering agencies. ANNA maintains it. 4. **MCC**: The four digits on a card payment that say what kind of shop it was. The whole standard. Feeds finance and business · ISO 18245:2023. ISO TC68 and the card networks maintain it. 5. **BIC**: The code that identifies a bank. Part of the standard. Feeds finance · ISO 9362:2014. The structure and its country codes, and not the register of banks itself. SWIFT maintains it. 6. **X12**: North America's electronic purchase orders and invoices. The whole standard. Feeds logistics and products · no version stated. Its transaction sets, its segments and its elements. 7. **UN/EDIFACT**: The same idea, for the rest of the world. Part of the standard. Feeds logistics · directory D.20B. Public domain under the UN terms of use. 195 of the 317 message types it publishes. 8. **EANCOM**: GS1's version of EDIFACT for consumer goods. The whole standard. Feeds logistics and products · no version stated. GS1 maintains it. 9. **Peppol**: Europe's e-invoicing network, now used well beyond Europe. The whole standard. Feeds logistics · no version stated. OpenPeppol maintains it. ## The lists everyone quotes If the other standards on this page cite it rather than compete with it, it is here. 5 standards, 1 held in part A developer wonders why country codes are filed beside the web's specifications. Because nearly every other row on this page cites one of them. When a shipping record names a country it is naming ISO 3166; when it names a port, UN/LOCODE; when it stamps a time, the IANA database; when it is published as linked data, a W3C specification decides what that means. This section is the bottom of the pile, and the rows above it lean on it. 1. **ISO 3166 · 4217 · 639**: Country codes, currency codes, language codes. The whole standard. Feeds places, units and language · no edition stated. Some ISO standards are free and others must be bought. 2. **UN/LOCODE**: A code for every port, airport and inland place goods pass through. The whole standard. Feeds places and logistics · our notes cite the loc241 release. Public domain under the UN terms of use. 3. **UN M49**: The UN's regions of the world. Part of the standard. Feeds places · no version stated. The regions only, and none of the countries underneath them. 4. **IANA time zone database**: The zones, and the rules for when the clocks change. The whole standard. Feeds units and places · taken from the vvo/tzdb mirror, downloaded 7 December 2025. Public domain. 5. **W3C**: The specifications the web is written to. The whole standard. Feeds tech and schema · twenty-two of them, from JSON-LD and RDF to WCAG and ARIA. Per-specification versions are not stated. W3C Software and Document Licence, with MDN's licence cited for some tables. Four of the twenty-two folders filed under W3C are not W3C's: DOM and HTML are WHATWG's, Dublin Core is DCMI's, FOAF is the FOAF project's. The folder name is a shelf label, not an attribution. ## Government registers If one government publishes it and everyone trading with that government has to use it, it is here. 6 standards, 4 held in part A contractor is trying to work out which product-service code a bid falls under. The row tells her what we hold and, more usefully, what we do not: the April 2025 manual's classes, and almost nothing beneath them. She learns in one line that this is not the place to finish that job. A page that had let her find that out on her own would have cost her the afternoon. 1. **Census Bureau**: State and county codes, and the metro-area boundaries. The whole standard. Feeds places · FIPS codes with the July 2023 metro-area delineation, downloaded 7 December 2025. Public domain. 2. **SEC**: The older industry list, still used on filings. The whole standard. Feeds industries · the four-digit SIC list, downloaded 7 December 2025. Public domain. 3. **USITC**: The tariff schedule for goods entering the United States. Part of the standard. Feeds products · downloaded 7 December 2025. Public domain. The chapters, and nothing beneath them. 4. **GSA**: The codes the federal government buys under. Part of the standard. Feeds products and services · Product Service Code Manual, April 2025, with the supply classes beside it. Public domain. The classes, and almost nothing beneath them. 5. **SBA**: What counts as a small business. Part of the standard. Feeds business · 13 CFR 121.201. Public domain. The business and contract types, and not the size thresholds by industry. 6. **USPTO**: The classes a trademark or a patent is filed under. Part of the standard. Feeds law and products · Nice Classification 12th edition 2025, with Locarno, CPC and USPC beside it, downloaded 7 December 2025. Public domain. The Nice and Locarno classes are whole; the patent classifications are a handful of rows. Four of these six are the beginning of a register rather than the register. Each row says which. ## Our standards If nobody outside this Foundation governs it, it is here. That is the whole test. 6 standards, written here A developer is deciding whether to build against AXP. The row says draft. It says 0.9.0. It says 23 August 2026. And the section says nobody outside this Foundation has yet built anything that depends on it. Then the row links to the specification, which is live and readable today. Nothing has been oversold, and the decision is hers with the facts already in front of her. 1. **AXP**: What an API has to publish so an agent can use it on first contact, with nobody reading the documentation. Written by the Foundation. Draft 0.9.0, dated 23 August 2026. Published by apis.ax and verified by api.qa. [axp.org.ai](https://axp.org.ai/) 2. **MDXLD**: MDX with $id, $type and $context in the frontmatter. Written by the Foundation. No version number. A superset of the open MDX format, whose frontmatter is itself a superset of YAML-LD. $context is always https://schema.org.ai, with no version in it. [mdx.org.ai/docs](https://mdx.org.ai/docs) · [mdxld.org](https://mdxld.org/) 3. **PRODUCT.md**: One Markdown file saying who a product is for, how it speaks and what it costs. Written by the Foundation. Draft. A specification we write, not a standard we host. [product.md](https://product.md/) 4. **TODO.md**: A task list a machine can also read, in a plain Markdown file. Written by the Foundation. No version number. In use in this Foundation's own repos today. [todo.md.org.ai](https://todo.md.org.ai/) 5. **schema.org.ai**: Our superset of Schema.org, extended for work machines do. Written by the Foundation. No version number. Adds our own types on top of the ones Schema.org publishes. CC BY-SA 4.0; the vocabulary it extends is CC BY-SA 3.0. [schema.org.ai](https://schema.org.ai/) 6. **AGENTS.md**: The frontmatter an AGENTS.md file carries so one file can compile to AGENTS.md, CLAUDE.md and .cursorrules. Written by the Foundation. No version number. [agents.md.org.ai](https://agents.md.org.ai/) AXP carries a version and a status in its own file: draft 0.9.0. The other five carry no version number yet. A standard of ours reaches 1.0 once at least two people outside the Foundation have built something that depends on it. ## How we cite Every record in the estate carries the same source line, so you never have to ask where a fact came from. Here is one, traced back. [How the Foundation copies its sources](https://foundation.org.ai/#sources) One record, traced back to where it came from. 1. **The record**: “Dental Hygienists”. O*NET-SOC 29-1292.00 2. **Seeded from**: **The O*NET database 30.0**, U.S. Department of Labor. Loaded from db_30_0_text 3. **Kept as**: **One row in ONET.Occupations.tsv**. Code 29-1292.00, exactly as published 4. **License**: **Public domain**. A U.S. Government work 5. **Changed by us**: **Nothing.** The file format, yes. What the record says, never. ## Use the register Every collection here is free to reuse on its publisher's terms, and the code that copies them is public. [GitHub](https://github.com/dot-org-ai/standards.org.ai) · [/llms.txt](https://standards.org.ai/llms.txt) · [foundation.org.ai](https://foundation.org.ai/) ## Partner with us Publish a standard, contribute a collection, or build on the register. Tell us what you have in mind. [Partner with us](https://foundation.org.ai/#partner) This page as HTML: https://standards.org.ai/. Everything on this site in one file: https://standards.org.ai/llms-full.txt.