# Telemetry ## Telemetry Distro **Status:**  **type:** `telemetry.distro` **Description:** The distribution of telemetry SDK used to capture data recorded by the instrumentation libraries. **Other Attributes:** > :warning: This entity definition contains attributes without a role. > Stable Entities MUST NOT have attributes without a defined role. | Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability | |---|---|---|---|---|---| | [`telemetry.distro.name`](/docs/registry/attributes/telemetry.md) | string | The name of the auto instrumentation agent or distribution, if used. [1] | `parts-unlimited-java` | `Recommended` |  | | [`telemetry.distro.version`](/docs/registry/attributes/telemetry.md) | string | The version string of the auto instrumentation agent or distribution, if used. | `1.2.3` | `Recommended` |  | **[1] `telemetry.distro.name`:** Official auto instrumentation agents and distributions SHOULD set the `telemetry.distro.name` attribute to a string starting with `opentelemetry-`, e.g. `opentelemetry-java-instrumentation`. ## Telemetry Sdk **Status:**  **type:** `telemetry.sdk` **Description:** The telemetry SDK used to capture data recorded by the instrumentation libraries. **Identifying Attributes:** | Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability | |---|---|---|---|---|---| | [`telemetry.sdk.language`](/docs/registry/attributes/telemetry.md) | string | The language of the telemetry SDK. | `cpp`; `dotnet`; `erlang` | `Required` |  | | [`telemetry.sdk.name`](/docs/registry/attributes/telemetry.md) | string | The name of the telemetry SDK as defined above. [2] | `opentelemetry` | `Required` |  | **[2] `telemetry.sdk.name`:** 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` | cpp |  | | `dotnet` | dotnet |  | | `erlang` | erlang |  | | `go` | go |  | | `java` | java |  | | `nodejs` | nodejs |  | | `php` | php |  | | `python` | python |  | | `ruby` | ruby |  | | `rust` | rust |  | | `swift` | swift |  | | `webjs` | webjs |  | **Descriptive Attributes:** | Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability | |---|---|---|---|---|---| | [`telemetry.sdk.version`](/docs/registry/attributes/telemetry.md) | string | The version string of the telemetry SDK. | `1.2.3` | `Required` |  |