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Specifications for OpenTelemetry
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OpenTelemetry Specification

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The OpenTelemetry specification describes the cross-language requirements and expectations for all OpenTelemetry implementations.

Table of Contents

Project Timeline

OpenTelemetry is currently under development. Check out our current milestones.


Changes to the specification are versioned according to Semantic Versioning 2.0 and described in Layout changes are not versioned. Specific implementations of the specification should specify which version they implement.

Changes to the change process itself are not currently versioned but may be independently versioned in the future.


The change process is still evolving. For the short term, please use issues to suggest changes and pull requests to suggest implementations of changes that have been discussed in a relevant issue.

We will be setting up a more complete RFC process to streamline the discussion of changes.

See for more details on contribution process.


By contributing to OpenTelemetry Specification repository, you agree that your contributions will be licensed under its Apache 2.0 License.

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