Standard
Open Definition
The Open Definition, a project of the Open Knowledge Foundation, sets out when knowledge, content or data count as open and which licences conform.
How it connects
Who is behind it
- Open Definition developed by Open Knowledge Foundation. The Open Definition is a project of the Open Knowledge Foundation.
Related to
- Open Definition relates to Open data. Defines what makes data open.
- Open Definition relates to Open licence. Maintains the list of licences that conform to it.
Links
Details
Description
Version 2.1 says knowledge is open if anyone is free to access, use, modify and share it, subject at most to measures that preserve provenance and openness. Its list of conformant licences includes CC0, CC BY and CC BY-SA.
Attributes
| url | https://opendefinition.org/od/2.1/en/ |
|---|---|
| identifiers | wikidata: Q21605525 |
| status | active |
| governance | Nonprofit |
| prominence | extended |
| type | Standard |
| standardKind | principles |
| specVersion | 2.1 |
| requiresOpenness | yes |
| Tags | region: global, openness: open content |
Sources
- https://opendefinition.org/od/2.1/en/(opens in a new tab) (accessed 2026-11-13): Version 2.1; the central definition sentence; "a project of Open Knowledge Foundation".
- https://opendefinition.org/licenses/(opens in a new tab) (accessed 2026-11-13): List of conformant licences.
- https://www.wikidata.org/wiki/Q21605525(opens in a new tab) (accessed 2026-11-13)
Last reviewed: 2026-11-13
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