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61 changes: 40 additions & 21 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -9,15 +9,45 @@ release.

### Context

### Traces

### Metrics

### Logs

### Baggage

### Profiles

### Resource

### Entities

### Common

### OpenTelemetry Protocol

### Compatibility

### SDK Configuration

### Supplementary Guidelines

### OTEPs

## v1.56.0 (2025-04-20)

### Context

- Align environment variable context propagation name restrictions with POSIX.1-2024
and define normalization behavior.
([#4914](https://github.com/open-telemetry/opentelemetry-specification/issues/4914))
([#4944](https://github.com/open-telemetry/opentelemetry-specification/pull/4944))
- Decouple the responsibilities of the environment variable propagation carrier.
([#4961](https://github.com/open-telemetry/opentelemetry-specification/issues/4961))
([#4961](https://github.com/open-telemetry/opentelemetry-specification/pull/4961))
- Remove misleading implementation approach the environment variable propagation.
([#5003](https://github.com/open-telemetry/opentelemetry-specification/issues/5003))
([#5003](https://github.com/open-telemetry/opentelemetry-specification/pull/5003))
- Change Environment Variables as Context Propagation Carriers document status to Beta.
([#5020](https://github.com/open-telemetry/opentelemetry-specification/issues/5020))
([#5020](https://github.com/open-telemetry/opentelemetry-specification/pull/5020))

### Traces

Expand All @@ -36,10 +66,6 @@ release.
- Add event to span event bridge.
([#5006](https://github.com/open-telemetry/opentelemetry-specification/pull/5006))

### Baggage

### Profiles

### Resource

- Clarify that a Resource describes the observed entity, not the component
Expand All @@ -51,14 +77,10 @@ release.
- Define merge algorithm.
([4768](https://github.com/open-telemetry/opentelemetry-specification/pull/4768))

### Common

### OpenTelemetry Protocol

### Compatibility

- Deprecate OpenTracing compatibility requirements in the specification.
([#4849](https://github.com/open-telemetry/opentelemetry-specification/issues/4849))
([#4938](https://github.com/open-telemetry/opentelemetry-specification/pull/4938))
- Stabilize sections of Prometheus and OpenMetrics Compatibility.
- Stabilize Prometheus Classic Histogram to OTLP Explicit Histogram transformation.
([#4874](https://github.com/open-telemetry/opentelemetry-specification/pull/4874))
Expand All @@ -82,26 +104,26 @@ release.
([#4964](https://github.com/open-telemetry/opentelemetry-specification/pull/4964))
- Stabilize sections of Prometheus Metrics Exporter.
- Stabilize host configuration.
([#4984](https://github.com/open-telemetry/opentelemetry-specification/issues/4984))
([#5025](https://github.com/open-telemetry/opentelemetry-specification/pull/5025))

### SDK Configuration

- Declarative configuration: add in-development guidance for exposing the
effective `Resource` returned by `Create`.
([#4948](https://github.com/open-telemetry/opentelemetry-specification/issues/4948))
([#4949](https://github.com/open-telemetry/opentelemetry-specification/pull/4949))
- Require spec changes to consider declarative config schema
([#4916](https://github.com/open-telemetry/opentelemetry-specification/pull/4916))
- Add strict YAML parsing guidance to configuration supplementary guidelines.
([#4878](https://github.com/open-telemetry/opentelemetry-specification/pull/4878))

### Supplementary Guidelines

### OTEPs

- Process Context: Sharing Resource Attributes with External Readers.
([#4719](https://github.com/open-telemetry/opentelemetry-specification/pull/4719))
- Support multiple Resources within an SDK.
([#4665](https://github.com/open-telemetry/opentelemetry-specification/pull/4665))

## v1.55.0 (TODO: update date before merging)
## v1.55.0 (2025-03-05)

### Traces

Expand Down Expand Up @@ -214,9 +236,6 @@ release.
- Stabilize complex `AnyValue` attribute value types and related attribute limits.
([#4794](https://github.com/open-telemetry/opentelemetry-specification/issues/4794))

- Support multiple Resources within an SDK.
([#4665](https://github.com/open-telemetry/opentelemetry-specification/pull/4665))

## v1.52.0 (2025-12-12)

### Context
Expand Down
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