License and attribution

The CLASP specification, its JSON Schemas, and the worked examples are licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) license. The full legal code is at sevresorg/clasp/LICENSE.

In plain language: you may copy, redistribute, remix, adapt, and build upon the specification, including for commercial purposes, provided you give appropriate credit to the Sèvres project.

Canonical attribution string

When reproducing all or part of the specification, attribute as follows:

CLASP (Clause-Level Access and Standards Protocol), version 0.1, by the Sèvres Project. Licensed under CC BY 4.0 . Source: sevresorg/clasp .

If you are referencing a specific version, include the version identifier (v0.1, future revisions will be v0.2, etc.) and ideally a git SHA or a permalink to the specific file in the repository.

What CC BY 4.0 requires

When you redistribute, adapt, or remix the specification:

Provide attribution (the string above is suitable).
Provide a link to the CC BY 4.0 license.
Indicate if you made changes (a one-line note such as “Adapted from CLASP v0.1; modifications by [your organization] include X and Y.” is sufficient).
Do not imply endorsement of your adaptation by the Sèvres project.

You are not required to use the same license for downstream works, but if you want your adaptations to flow back into the protocol ecosystem, contributing changes via sevresorg/clasp is the most useful path.

What CC BY 4.0 does not cover

The Norma platform is a separate artifact, not licensed CC BY 4.0. See norma.sevres.org for Norma-specific licensing.
The site you are reading right now (clasp.sevres.org) is generated by arobinsongit/clasp-web, which is separately MIT-licensed.
The reference MCP implementation (planned, arobinsongit/clasp-mcp) will be MIT-licensed.

The protocol itself, the schemas, and the worked examples are the only artifacts under CC BY 4.0.

Contact

License questions, attribution corrections, or commercial-use clarifications: info@sevres.org.