cloud: Add oracle_cloud.realm vendor-specific attribute for Oracle Cloud Infrastructure (OCI) realm identifier. (#3121)
An Oracle Cloud realm is a logical collection of cloud regions that are isolated from each other, used for compliance and data residency requirements.

db: Mark the Oracle Database client span as Release Candidate. (#2989)

db: Modify area to oracledb from oracle (#3316)

db: Clarified db.query.summary behavior for batch operations. (#3287)

db, rpc: Define domain-specific exception events for database and RPC (#3426)
These domain-specific exception events provide a structured way to record
exceptions that occur during operations in each area:

• db.client.operation.exception for database client operations
• rpc.client.call.exception and rpc.server.call.exception for RPC

docs: Add how-to guide for defining spans (#3240)

event: Allow event body to represent a display message. (#3343)

exception: Indicate that exception.message attribute may contain sensitive information. (#2967, #3310)

exceptions: Introduce OTEL_SEMCONV_EXCEPTION_SIGNAL_OPT_IN environment variable for transitioning exception recording from span events to logs. (#3363)

gcp: Add GCP GCE Instance Group Manager attributes (#905)

gen-ai: Add retrieval span support to the gen-ai semantic conventions. (#2907)

gen-ai: Enhance how tool calls are captured to extend support for server side tools.
(#2585)

gen-ai: Add gen_ai.agent.version attribute to capture the version of an agent. (#3428)

gen-ai: Add cache token attributes and provider-specific normalization guidance for GenAI usage metrics (#1959)

• Add gen_ai.usage.cache_read.input_tokens attribute for tokens served from provider cache
• Add gen_ai.usage.cache_creation.input_tokens attribute for tokens written to provider cache
• Add provider-specific token handling notes to OpenAI span
• Add Anthropic span with computation guidance for gen_ai.usage.input_tokens

gen_ai: Added sampling-relevant flag to relevant GenAI span attributes to indicate their importance for sampling decisions. (#2994)

http: Defined declarative configuration for overriding known HTTP methods. (#3394)

http: Define declarative configuration for sensitive query parameters. (#3403)

http: Define http.client.request.exception and http.server.request.exception events for recording exceptions during HTTP operations (#3414)
These domain-specific exception events provide a structured way to record
exceptions that occur during HTTP client requests (network failures, timeouts)
and HTTP server request processing (application errors, internal failures).

jvm: Add jvm.file_descriptor.limit as an in-development metric to track the maximum number of open file descriptors as reported by the JVM. (#3430)

k8s: Promote a selection of k8s and container attributes to beta (#3120)

k8s: Add k8s.service entity with endpoint and load balancer ingress metrics (#3294)
New metrics:

• k8s.service.endpoint.count: Number of endpoints by condition, address type, and zone
• k8s.service.load_balancer.ingress.count: Number of load balancer ingress points
  New attributes:
• k8s.service.endpoint.condition, k8s.service.endpoint.address_type, k8s.service.endpoint.zone
• k8s.service.traffic_distribution, k8s.service.publish_not_ready_addresses
  New entity:
• entity.k8s.service: k8s service entity with identifying and descriptive attributes

openai: Add openai.api.type attribute to distinguish between different OpenAI API types for similar operations. (#3337)

pprof: add pprof.scope.default_sample_type and pprof.scope.sample_type_order attributes to support lossless conversion of pprof profiles. (#3078)

rpc: Mark core RPC (plus gRPC and Apache Dubbo) semantic conventions as release candidate. (#3446)

rpc: Add Metrics sections to JSON-RPC, gRPC, and Connect RPC system-specific conventions (#3319, #3320)

rpc: Change rpc.server.call.duration and rpc.client.call.duration metrics from recommended to required (#3284)

rpc: Add RPC migration guide documenting changes from v1.37.0 to latest version. (#3204)

rpc: Clarify that network.peer.address should indicate the last contacted address in case of retries.
(#3392, #3427)

rpc: Add semantic conventions for Apache Dubbo RPC system. (#3291)

rpc: Clarify how to populate server.address and server.port when using client-side load balancing or service discovery.
(#3258, #3317)

service: Add service.criticality attribute to classify services based on operational importance (#2986)
This attribute enables observability platforms to implement criticality-aware tracing, monitoring,
and sampling strategies. Supports four levels: critical, high, medium, and low.

service: Stabilize service.instance.id attribute. (#1519)
The service.instance.id attribute and entity are promoted from development to stable.

service: Stabilize service.namespace attribute. (#3254)
The service.namespace attribute is promoted from development to stable.