v1.38.0 (2024-10-10)

Traces

• Make all fields as identifying for Tracer. Previously attributes were omitted from being identifying. (#4161)
• Clarify that Export MUST NOT be called by simple and batching processors concurrently. (#4205)

Metrics

• Make all fields as identifying for Meter. Previously attributes were omitted from being identifying. (#4161)
• Add support for filtering attribute keys for streams via an exclude list. (#4188)
• Clarify that Enabled only applies to synchronous instruments. (#4211)
• Clarify that applying cardinality limits should be done after attribute filtering. (#4228)
• Mark cardinality limits as stable. (#4222)

Logs

• Make all fields as identifying for Logger. Previously attributes were omitted from being identifying. (#4161)
• Define Enabled parameters for Logger. (#4203) (#4221)
• Introduce initial placeholder for the new user-facing Logs API, adding references to existing API's informing of the coming changes while the definition is defined. (#4236)

Common

• Define equality for attributes and collection of attributes. (#4161)
• Update Instrumentation Scope glossary entry with correct identifying fields (#4244)

New Contributors

• @yuanyuanzhao3 made their first contribution in https://github.com/open-telemetry/opentelemetry-specification/pull/4216
• @MSNev made their first contribution in https://github.com/open-telemetry/opentelemetry-specification/pull/4236