v0.7.0 (11-18-2020)

Trace API was declared frozen 1121

New

• Document service name mapping for Jaeger exporters
  (1222)
• Change default OTLP port number
  (#1221)
• Add performance benchmark specification
  (#748)
• Enforce that the Baggage API must be fully functional, even without an installed SDK.
  (#1103)
• Rename "Canonical status code" to "Status code"
  (#1081)
• Add Metadata for Baggage entries, and clarify W3C Baggage Propagator implementation
  (#1066)
• Change Status to be consistent with Link and Event
  (#1067)
• Clarify env variables in otlp exporter
  (#975)
• Add Prometheus exporter environment variables
  (#1021)
• Default propagators in un-configured API must be no-op
  (#930)
• Define resource mapping for Jaeger exporters
  (#891)
• Add resource semantic conventions for operating systems
  (#693)
• Add semantic convention for source code attributes
  (#901)
• Add semantic conventions for outgoing Function as a Service (FaaS) invocations
  (#862)
• Add resource semantic convention for deployment environment
  (#606)
• Refine semantic conventions for messaging systems and add specific attributes for Kafka
  (#1027)
• Clarification of the behavior of the Trace API, re: context propagation, in
  the absence of an installed SDK
• Add API and semantic conventions for recording exceptions as Span Events
  (#697)
  • API was extended to allow adding arbitrary event attributes (#874)
  • exception.escaped semantic span event attribute was added
    (#784,
    #946)
• Allow samplers to modify tracestate
  (#988)
• Update the header name for otel baggage, and version date
  (#981)
• Define PropagationOnly Span to simplify active Span logic in Context
  (#994)
• Add limits to the number of attributes, events, and links in SDK Spans
  (#942)
• Add Metric SDK specification (partial): covering terminology and Accumulator component
  (#626)
• Clarify context interaction for trace module
  (#1063)
• Add Shutdown function to *Provider SDK
  (#1074)
• Add semantic conventions for system metrics
  (#937)
• Add db.sql.table to semantic conventions, allow db.operation for SQL
  (#1141)
• Add OTEL_TRACE_SAMPLER env variable definition
  (#1136)
• Add guidelines for OpenMetrics interoperability
  (#1154)
• Add OTEL_TRACE_SAMPLER_ARG env variable definition
  (#1202)

Updates

• Clarify null SHOULD NOT be allowed even in arrays
  (#1214)
• Remove ordering SHOULD-requirement for attributes
  (#1212)
• Make process.pid optional, split process.command_args from command_line
  (#1137)
• Renamed CorrelationContext to Baggage:
  (#857)
• Add semantic convention for NGINX custom HTTP 499 status code.
• Adapt semantic conventions for the span name of messaging systems
  (#690)
• Remove lazy Event and Link API from Span interface
  (#840)
  • SIGs are recommended to remove any existing implementation of the lazy APIs
    to avoid conflicts/breaking changes in case they will be reintroduced to the
    spec in future.
• Provide clear definitions for readable and read/write span interfaces in the
  SDK
  (#669)
  • SpanProcessors must provide read/write access at least in OnStart.
• Specify how Probability sampler is used with ParentOrElse sampler.
• Clarify event timestamp origin and range
  (#839)
• Clean up api-propagators.md, by extending documentation and removing redundant
  sections
  (#577)
• Rename HTTPText propagator to TextMap
  (#793)
• Rename ParentOrElse sampler to ParentBased and add multiple delegate samplers
  (#610)
• Rename ProbabilitySampler to TraceIdRatioBasedSampler and add requirements
  (#611)
• Version attributes no longer have a prefix such as semver:
  (#873)
• Add semantic conventions for process runtime
  (#882,
  #1137)
• Use hex encoding for trace id and span id fields in OTLP JSON encoding:
  (#911)
• Explicitly specify the SpanContext APIs IsValid and IsRemote as required
  (#914)
• A full Context is the only way to specify a parent of a Span.
  SpanContext or even Span are not allowed anymore.
  (#875)
• Remove obsolete http.status_text from semantic conventions
  (#972)
• Define null as an invalid value for attributes and declare attempts to set
  null as undefined behavior
  (#992)
• SDK: Rename the Decision values for SamplingResults to DROP, RECORD_ONLY
  and RECORD_AND_SAMPLE for consistency
  (#938,
  #956)
• Metrics API: Replace "Additive" with "Adding", "Non-Additive" with "Grouping"
  (#983
• Move active span interaction in the Trace API to a separate class
  (#923)
• Metrics SDK: Specify LastValue default aggregation for ValueObserver
  (#984
• Metrics SDK: Specify TBD default aggregation for ValueRecorder
  (#984
• Trace SDK: Sampler.ShouldSample gets parent Context instead of SpanContext
  (#881)
• SDK: Specify known values, as well as basic error handling for OTEL_PROPAGATORS.
  (#962)
  (#995)
• SDK: Specify when to generate new IDs with sampling
  (#1225)
• Remove custom header name for Baggage, use official header
  (#993)
• Trace API: Clarifications for Span.End, e.g. IsRecording becomes false after End
  (#1011)
• Update semantic conventions for gRPC for new Span Status
  (#1156)