open-telemetry/opentelemetry-specification v1.56.0

Release 1.56.0

on GitHub

Context

• Align environment variable context propagation name restrictions with POSIX.1-2024
  and define normalization behavior.
  (#4944)
• Decouple the responsibilities of the environment variable propagation carrier.
  (#4961)
• Remove misleading implementation approach the environment variable propagation.
  (#5003)
• Change Environment Variables as Context Propagation Carriers document status to Beta.
  (#5020)

Traces

• Stabilize Tracer enabled operation
  (#4941)
• Stabilize AlwaysRecord sampler.
  (#4934)

Metrics

• Add development maxExportBatchSize parameter to Periodic exporting MetricReader.
  (#4895)

Logs

• Add event to span event bridge.
  (#5006)

Resource

• Clarify that a Resource describes the observed entity, not the component
  that technically emits telemetry.
  (#4905)

Entities

• Define merge algorithm.
  (4768)

Compatibility

• Deprecate OpenTracing compatibility requirements in the specification.
  (#4938)
• Stabilize sections of Prometheus and OpenMetrics Compatibility.
  • Stabilize Prometheus Classic Histogram to OTLP Explicit Histogram transformation.
    (#4874)
  • Stabilize Prometheus Timestamp and Start timestamp transformation.
    (#4953)
  • Clarify Prometheus Native Histogram to OTLP Exponential Histogram conversion,
    add conversion rules for Native Histograms with Custom Buckets (NHCB) to OTLP
    Histogram.
    (#4898)
  • Stabilize Prometheus Dropped Types transformation.
    (#4952)
  • Stabilize OpenTelemetry Attributes to Prometheus labels transformation.
    (#4963)
  • Stabilize Prometheus Exemplar to OpenTelemetry Exemplar transformation.
    (#4962)
  • Stabilize Prometheus Metadata transformation.
    (#4954)
  • Stabilize OpenTelemetry Metric Metadata to Prometheus metric metadata.
    (#4966)
  • Stabilize OpenTelemetry Exemplar to Prometheus Exemplar transformation.
    (#4964)
• Stabilize sections of Prometheus Metrics Exporter.
  • Stabilize host configuration.
    (#5025)

SDK Configuration

• Declarative configuration: add in-development guidance for exposing the
  effective Resource returned by Create.
  (#4949)
• Require spec changes to consider declarative config schema
  (#4916)
• Add strict YAML parsing guidance to configuration supplementary guidelines.
  (#4878)

OTEPs

• Process Context: Sharing Resource Attributes with External Readers.
  (#4719)
• Support multiple Resources within an SDK.
  (#4665)

New Contributors

• @fractalwrench made their first contribution in #4907
• @svencowart made their first contribution in #4905
• @tiffany76 made their first contribution in #4958
• @krajorama made their first contribution in #4898
• @adp2201 made their first contribution in #4938
• @dbarker made their first contribution in #4974
• @johannaojeling made their first contribution in #4969
• @bachp made their first contribution in #4996
• @iblancasa made their first contribution in #4949
• @ivoanjo made their first contribution in #4719

Full Changelog: v1.55.0...v1.56.0