# Telemetry ## Telemetry Attributes This document defines attributes for telemetry SDK. | Attribute | Type | Description | Examples | Stability | | -------------------------- | ------ | ------------------------------------------------------------------------------ | ------------------------- | ---------------------------------------------------------------- | | `telemetry.distro.name` | string | The name of the auto instrumentation agent or distribution, if used. [1] | `parts-unlimited-java` |  | | `telemetry.distro.version` | string | The version string of the auto instrumentation agent or distribution, if used. | `1.2.3` |  | | `telemetry.sdk.language` | string | The language of the telemetry SDK. | `cpp`; `dotnet`; `erlang` |  | | `telemetry.sdk.name` | string | The name of the telemetry SDK as defined above. [2] | `opentelemetry` |  | | `telemetry.sdk.version` | string | The version string of the telemetry SDK. | `1.2.3` |  | **[1]:** Official auto instrumentation agents and distributions SHOULD set the `telemetry.distro.name` attribute to a string starting with `opentelemetry-`, e.g. `opentelemetry-java-instrumentation`. **[2]:** The OpenTelemetry SDK MUST set the `telemetry.sdk.name` attribute to `opentelemetry`. If another SDK, like a fork or a vendor-provided implementation, is used, this SDK MUST set the `telemetry.sdk.name` attribute to the fully-qualified class or module name of this SDK's main entry point or another suitable identifier depending on the language. The identifier `opentelemetry` is reserved and MUST NOT be used in this case. All custom identifiers SHOULD be stable across different versions of an implementation. `telemetry.sdk.language` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used. | Value | Description | Stability | | -------- | ----------- | ---------------------------------------------------------- | | `cpp` | none |  | | `dotnet` | none |  | | `erlang` | none |  | | `go` | none |  | | `java` | none |  | | `nodejs` | none |  | | `php` | none |  | | `python` | none |  | | `ruby` | none |  | | `rust` | none |  | | `swift` | none |  | | `webjs` | none |  |