This repository contains the point-of-truth source data of the International Standards Organization's Technical Committee 211 (Geographic information/Geomatics)'s code sets. Code sets are controlled lists of identified terms used in standards.
The code set content here is stored here in RDF data files in the Turtle format as Semantic Web vocabularies according to the Vocabulary Publication Profile of SKOS, with SKOS being the SKOS Simple Knowledge Organization System model.
The code sets are published online at IRI persistent identifier locations resolved via the Open Geospatial Consortium's "Rainbow" reference data publication system at:
The code sets here are maintained via procedures aligning with ISO 19135:2026 Geographic information — Procedures for item registration with the TC-211's Advisory Group 6 Group for Ontology Maintenance (GOM) acting as the Control Body organising expert reviews of proposed content changes.
If you want to propose changes, including new terms, for the code sets, please create Pull Requests on this repository at https://github.com/iso-TC211/codesets/pulls.
Not all the Code Sets within TC-211's 19* series of standards are yet delivered here. Those that are, are published at https://def.isotc211.org/codesets with the remainder to be delivered by May 2026.
Governance procedures for this content are still in development as of March 2026. The Control Body will communicate with anyone proposing changes (Submitters) to determine appropriate reviews until the procedures and finalised, at which point they will be documented here and at the def.isotc211.org namespace's home.
The RDF resources in this repository woithin the resurces/ folder that constitute the catalogue of code sets are organised according to a structured manifest allowing for automated validation and absorption by the OGC Rainbow system. The following table of resources is auto-generated by the PrezManifest tool:
| Resource | Role | Description |
|---|---|---|
Catalogue Definition:resources/catalogues/common.ttl |
Catalogue Data | The definition of, and metadata for, the code sets container object - catalogue |
Resource Data:resources/codesets/*.ttl |
Resource Data | Code sets as catalogued resources |
Labels Files:resources/background/*.ttl |
Complete Catalogue and Resource Labels | Labels for resource data elements and reference data such as Agents |
These vocabularies are available for reuse under the conditions of the Creative Commons BY 4.0 License, a copy of the deed of which is contained in this repository in the LICENSE file.
These vocabularies and the software in this repository is copyright as follows:
© International Organization for Standardization, 2026
These code sets are managed by the TC-211's Advisory Group 6 Group for Ontology Maintenance (GOM). Please contact that group using the details at:
Note
Contact points for individual code sets are not yet available but are planned to become so when code set maintenance is completely implemented, expected in late 2025.