Added

• Add go.opentelemetry.io/otel/sdk/metric/exemplar.AlwaysOffFilter, which can be used to disable exemplar recording. (Allow configuring the exemplar filter on the metrics SDK #5850)
• Add go.opentelemetry.io/otel/sdk/metric.WithExemplarFilter, which can be used to configure the exemplar filter used by the metrics SDK. (Allow configuring the exemplar filter on the metrics SDK #5850)
• Add ExemplarReservoirProviderSelector and DefaultExemplarReservoirProviderSelector to go.opentelemetry.io/otel/sdk/metric, which defines the exemplar reservoir to use based on the aggregation of the metric. (Add selector of exemplar reservoir providers to metric.Stream configuration #5861)
• Add ExemplarReservoirProviderSelector to go.opentelemetry.io/otel/sdk/metric.Stream to allow using views to configure the exemplar reservoir to use for a metric. (Add selector of exemplar reservoir providers to metric.Stream configuration #5861)
• Add ReservoirProvider, HistogramReservoirProvider and FixedSizeReservoirProvider to go.opentelemetry.io/otel/sdk/metric/exemplar to make it convenient to use providers of Reservoirs. (Add selector of exemplar reservoir providers to metric.Stream configuration #5861)
• The go.opentelemetry.io/otel/semconv/v1.27.0 package.
  The package contains semantic conventions from the v1.27.0 version of the OpenTelemetry Semantic Conventions. (Generate semconv/v1.27.0 #5894)
• Add Attributes attribute.Set field to Scope in go.opentelemetry.io/otel/sdk/instrumentation. (sdk/instrumentation: Add Attributes to Scope #5903)
• Add Attributes attribute.Set field to ScopeRecords in go.opentelemetry.io/otel/log/logtest. (log/logtest: Add Attributes to ScopeRecords #5927)
• go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc adds instrumentation scope attributes. (otlptrace: Add instrumentation scope attributes #5934)
• go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp adds instrumentation scope attributes. (otlptrace: Add instrumentation scope attributes #5934)
• go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc adds instrumentation scope attributes. (otlpmetric: Add instrumentation scope attributes #5935)
• go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp adds instrumentation scope attributes. (otlpmetric: Add instrumentation scope attributes #5935)
• go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc adds instrumentation scope attributes. (otlplog: Add instrumentation scope attributes #5933)
• go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp adds instrumentation scope attributes. (otlplog: Add instrumentation scope attributes #5933)
• go.opentelemetry.io/otel/exporters/prometheus adds instrumentation scope attributes in otel_scope_info metric as labels. (prometheus: Add instrumentation scope attributes to otel_scope_info #5932)

Changed

• Support scope attributes and make them as identifying for Tracer in go.opentelemetry.io/otel and go.opentelemetry.io/otel/sdk/trace. (Make scope attributes as identifying for Tracer #5924)
• Support scope attributes and make them as identifying for Meter in go.opentelemetry.io/otel and go.opentelemetry.io/otel/sdk/metric. (Make scope attributes as identifying for Meter #5926)
• Support scope attributes and make them as identifying for Logger in go.opentelemetry.io/otel and go.opentelemetry.io/otel/sdk/log. (Make scope attributes as identifying for Logger #5925)
• Make schema URL and scope attributes as identifying for Tracer in go.opentelemetry.io/otel/bridge/opentracing. (opentracing: Make schemaURL and scope attributes as identifying for Tracer #5931)
• Clear unneeded slice elements to allow GC to collect the objects in go.opentelemetry.io/otel/sdk/metric and go.opentelemetry.io/otel/sdk/trace. (Allow GC to collect unneeded slice elements #5804)

Fixed

• Global MeterProvider registration unwraps global instrument Observers, the undocumented Unwrap() methods are now private. (otel: conceal unwrapping for global async instrument registration #5881)
• go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc now keeps the metadata already present in the context when WithHeaders is used. (otlpmetricgrpc: Keep metadata for gRPC in context #5892)
• go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc now keeps the metadata already present in the context when WithHeaders is used. (Keep metadata for gRPC in context for log signal #5911)
• go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc now keeps the metadata already present in the context when WithHeaders is used. (Allow additional context to be added when WithHeaders is used in OTLP gRPC traces exporter #5915)
• Fix go.opentelemetry.io/otel/exporters/prometheus trying to add exemplars to Gauge metrics, which is unsupported. (Fix exemplars being added to gauge metrics in the prometheus exporter #5912)
• Fix WithEndpointURL to always use a secure connection when an https URL is passed in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc. (Override insecure when endpoint URL is set #5944)
• Fix WithEndpointURL to always use a secure connection when an https URL is passed in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp. (Override insecure when endpoint URL is set #5944)
• Fix WithEndpointURL to always use a secure connection when an https URL is passed in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc. (Override insecure when endpoint URL is set #5944)
• Fix WithEndpointURL to always use a secure connection when an https URL is passed in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp. (Override insecure when endpoint URL is set #5944)
• Fix incorrect metrics generated from callbacks when multiple readers are used in go.opentelemetry.io/otel/sdk/metric. (Fix incorrect metrics getting generated from multiple readers #5900)

Removed

• Remove all examples under go.opentelemetry.io/otel/example as they are moved to Contrib repository. (Remove examples #5930)