Compliance of Implementations with Specification The following tables show which features are implemented by each OpenTelemetry
language implementation.
+ means the feature is supported, - means it is not supported, N/A means
the feature is not applicable to the particular language, blank cell means the
status of the feature is not known.
Feature
Optional
Go
Java
JS
Python
Ruby
Erlang
PHP
Rust
C++
.Net
Swift
TracerProvider
Create TracerProvider
+
+
+
+
+
+
+
+
+
+
+
Get a Tracer
+
+
+
+
+
+
+
+
+
+
+
Safe for concurrent calls
+
+
+
+
+
+
+
+
+
+
+
Shutdown (SDK only required)
+
+
+
+
-
+
+
+
+
Trace / Context interaction
Get active Span
+
+
+
+
N/A
+
+
+
+
Set active Span
+
+
+
+
N/A
+
+
+
+
Tracer
Create a new Span
+
+
+
+
+
+
+
+
+
+
+
Get active Span
+
+
+
+
+
+
+
+
+
+
+
Mark Span active
+
+
+
+
+
+
+
+
+
+
+
Safe for concurrent calls
+
+
+
+
+
+
+
+
+
+
+
SpanContext
IsValid
+
+
+
+
+
+
+
+
+
+
+
IsRemote
-
+
+
+
+
+
+
+
+
+
+
Conforms to the W3C TraceContext spec
+
+
+
+
+
+
+
+
+
Span
Create root span
+
+
+
+
+
+
+
+
+
+
+
Create with default parent (active span)
+
+
+
+
+
+
+
+
+
+
+
Create with parent from Context
+
+
+
+
+
+
+
+
+
+
+
No explicit parent Span/SpanContext allowed
+
+
+
+
+
+
-
+
SpanProcessor.OnStart receives parent Context
+
+
+
+
+
+
-
+
UpdateName
+
+
+
+
+
+
+
+
+
+
+
User-defined start timestamp
+
+
+
+
+
+
+
+
+
+
+
End
+
+
+
+
+
+
+
+
+
+
+
End with timestamp
+
+
+
+
+
+
+
+
+
+
+
IsRecording
+
+
+
+
+
+
+
+
+
+
+
IsRecording becomes false after End
+
+
+
+
+
+
-
+
Set status with StatusCode (Unset, Ok, Error)
+
+
+
+
-
+
+
+
Safe for concurrent calls
+
+
+
+
+
+
+
+
+
+
+
events collection size limit
+
+
+
+
-
+
+
-
+
attribute collection size limit
+
+
+
+
-
+
+
-
+
links collection size limit
+
+
+
+
-
+
+
-
+
Span attributes
SetAttribute
+
+
+
+
+
+
+
+
+
+
+
Set order preserved
X
+
-
+
+
+
+
+
+
+
+
+
String type
+
+
+
+
+
+
+
+
+
+
+
Boolean type
+
+
+
+
+
+
+
+
+
+
+
Double floating-point type
+
+
+
+
+
+
-
+
+
+
+
Signed int64 type
+
+
+
+
+
+
-
+
+
+
+
Array of primitives (homogeneous)
+
+
+
+
+
+
+
+
+
+
+
null values documented as invalid/undefined+
+
+
N/A
+
N/A
Unicode support for keys and string values
+
+
+
+
+
+
+
+
+
+
+
Span linking
AddLink
+
+
+
+
+
+
+
+
-
+
+
Safe for concurrent calls
+
+
+
+
+
+
+
+
+
+
+
Span events +
AddEvent
+
+
+
+
+
+
+
+
+
+
+
Add order preserved
+
+
+
+
+
+
+
+
+
+
+
Safe for concurrent calls
+
+
+
+
+
+
+
+
+
+
+
Span exceptions
RecordException
-
+
+
+
+
-
+
-
+
-
RecordException with extra parameters
-
+
+
+
+
-
+
-
+
-
Sampling
Allow samplers to modify tracestate
+
+
+
+
+
-
+
ShouldSample gets full parent Context
+
+
+
+
+
+
-
+
New Span ID created also for non-recording Spans +
+
-
+
IdGenerators ]
SpanLimits ]X
Feature
Optional
Go
Java
JS
Python
Ruby
Erlang
PHP
Rust
C++
.Net
Swift
Basic support
+
+
+
+
+
+
+
+
Use official header name baggage
+
+
+
+
+
+
+
+
Feature
Optional
Go
Java
JS
Python
Ruby
Erlang
PHP
Rust
C++
.Net
Swift
TBD
Feature
Optional
Go
Java
JS
Python
Ruby
Erlang
PHP
Rust
C++
.Net
Swift
Create from Attributes
+
+
+
+
+
+
+
+
+
+
Create empty
+
+
+
+
+
+
+
+
+
+
Merge (v2) +
+
+
Retrieve attributes
+
+
+
+
+
+
+
+
+
+
Default value for service.name+
+
+
Feature
Optional
Go
Java
JS
Python
Ruby
Erlang
PHP
Rust
C++
.Net
Swift
Create Context Key
+
+
+
+
+
+
+
+
+
+
Get value from Context
+
+
+
+
+
+
+
+
+
+
Set value for Context
+
+
+
+
+
+
+
+
+
+
Attach Context
+
+
+
+
+
+
+
+
-
-
Detach Context
+
+
+
+
+
+
+
+
-
-
Get current Context
+
+
+
+
+
+
+
+
+
+
Composite Propagator
+
+
+
+
N/A
+
+
+
Global Propagator
+
+
+
+
+
+
+
+
TraceContext Propagator
+
+
+
+
+
+
+
+
+
B3 Propagator
+
+
+
+
+
+
+
+
Jaeger Propagator
+
+
+
+
+
-
-
TextMapPropagator
Fields
+
+
+
+
+
+
+
Setter argument
+
+
+
+
+
+
+
Getter argument
+
+
+
+
+
+
+
Getter argument returning Keys
+
+
+
+
-
+
Note: Support for environment variables is optional.
Feature
Go
Java
JS
Python
Ruby
Erlang
PHP
Rust
C++
.Net
Swift
OTEL_RESOURCE_ATTRIBUTES
+
+
+
+
+
-
-
+
-
+
-
OTEL_LOG_LEVEL
-
+
- +
-
-
-
-
-
OTEL_PROPAGATORS
+
+
-
-
-
-
-
OTEL_BSP_*
+
+
+
-
-
+
-
-
-
OTEL_EXPORTER_OTLP_*
-
-
+
-
-
-
-
-
OTEL_EXPORTER_JAEGER_*
+
+
+
-
-
+
-
-
-
OTEL_EXPORTER_ZIPKIN_*
+
+
-
-
-
-
-
OTEL_TRACES_EXPORTER
OTEL_METRICS_EXPORTER
+
-
-
-
OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT
OTEL_SPAN_EVENT_COUNT_LIMIT
OTEL_SPAN_LINK_COUNT_LIMIT
OTEL_TRACES_SAMPLER
OTEL_TRACES_SAMPLER_ARG
Feature
Optional
Go
Java
JS
Python
Ruby
Erlang
PHP
Rust
C++
.Net
Swift
Standard output (logging)
+
+
+
+
+
+
-
+
+
+
+
In-memory (mock exporter)
+
+
+
+
+
+
-
-
+
+
+
OTLP
OTLP/gRPC Exporter
*
+
+
+
+
+
+
+
+
+
OTLP/HTTP binary Protobuf Exporter
*
-
-
+
- +
+
-
-
OTLP/HTTP JSON Protobuf Exporter
*
-
-
+
- -
-
-
OTLP/HTTP gzip Content-Encoding support
X
-
-
+
+
+
-
-
-
Concurrent sending
-
+
- -
+
-
-
Honors retryable responses with backoff
X
+
+
+
+
-
-
-
Honors non-retryable responses
X
+
-
+
+
-
-
-
Honors throttling response
X
+
-
+
+
-
-
-
Multi-destination spec compliance
X
-
- -
-
-
Zipkin
Zipkin V1 JSON
X
+
- -
-
-
-
-
Zipkin V1 Thrift
X
+
- -
-
-
-
-
Zipkin V2 JSON
*
+
+
+
-
+
+
+
+
Zipkin V2 Protobuf
*
+
+
+
-
-
-
Service name mapping
+
+
+
+
+
+
+
+
+
SpanKind mapping
+
+
+
+
+
+
+
+
+
InstrumentationLibrary mapping
+
-
+
-
-
+
+
+
Boolean attributes
+
+
+
+
+
+
+
+
+
Array attributes
+
+
+
- +
+
+
+
+
Status mapping
+
+
+
+
+
+
+
+
+
Error Status mapping
+
+
-
Event attributes mapping to Annotations
+
+
+
+
+
+
+
+
+
Integer microseconds in timestamps
+
+
+
+
Jaeger
Jaeger Thrift over UDP
*
+
+
+
+
Jaeger Protobuf via gRPC
*
+
- -
-
Jaeger Thrift over HTTP
*
+
+
+
-
-
Service name mapping
- +
+
+
+
Resource to Process mapping
+
- +
+
-
InstrumentationLibrary mapping
+
+
+
+
-
Status mapping
+
+
+
+
Error Status mapping
+
+
+
-
Events converted to Logs
+
+
+
+
+
OpenCensus
TBD
Prometheus
TBD
For each type of exporter, OTLP, Zipkin, and Jaeger, implementing at least one of the supported formats is required.
Implementing more than one formats is optional.