> This page is for NeMo Relay, version v0.10.0.
> For other versions, use one of these documentation indexes:
> - Latest (v0.10.0) (default): https://docs.nvidia.com/nemo/relay/latest/llms.txt
> - dev: https://docs.nvidia.com/nemo/relay/dev/llms.txt
> - v0.10.0: https://docs.nvidia.com/nemo/relay/v0.10.0/llms.txt
> - v0.9.4: https://docs.nvidia.com/nemo/relay/v0.9.4/llms.txt
> - v0.8.4: https://docs.nvidia.com/nemo/relay/v0.8.4/llms.txt
> - v0.7.3: https://docs.nvidia.com/nemo/relay/v0.7.3/llms.txt
> - v0.6.0: https://docs.nvidia.com/nemo/relay/v0.6.0/llms.txt
> - v0.5.0: https://docs.nvidia.com/nemo/relay/v0.5.0/llms.txt

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/relay/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/relay/_mcp/server.

# Module observability

> Optional observability integrations for NeMo Relay Core.

Generated from `cargo doc --no-deps -p nemo-relay -p nemo-relay-adaptive -p nemo-relay-pii-redaction -p nemo-relay-ffi -p nemo-relay-types -p nemo-relay-plugin -p nemo-relay-worker-proto -p nemo-relay-worker`.

Optional observability integrations for NeMo Relay Core.

## Modules

* [atif](/reference/api/rust-library-reference/nemo-relay/observability/atif): Agent Trajectory Interchange Format (ATIF) exporter.
* [atof](/reference/api/rust-library-reference/nemo-relay/observability/atof): Agent Trajectory Observability Format (ATOF) JSONL exporter support for NeMo Flow.
* [otel](/reference/api/rust-library-reference/nemo-relay/observability/otel): OpenTelemetry subscriber support for NeMo Relay.
* [otel\_file](/reference/api/rust-library-reference/nemo-relay/observability/otel_file): OTLP file export for NeMo Relay Core.
* [otel\_logs](/reference/api/rust-library-reference/nemo-relay/observability/otel_logs): OpenTelemetry log export for sanitized Relay mark events.
* [otel\_metrics](/reference/api/rust-library-reference/nemo-relay/observability/otel_metrics): OpenTelemetry metric export for Relay metric marks.
* [plugin\_component](/reference/api/rust-library-reference/nemo-relay/observability/plugin_component): Built-in observability plugin component.

## Structs

* [OpenTelemetryRuntimeDiagnostic](/reference/api/rust-library-reference/nemo-relay/observability/struct-opentelemetryruntimediagnostic): A bounded aggregate describing an OpenTelemetry runtime problem.
* [OpenTelemetryRuntimeDiagnostics](/reference/api/rust-library-reference/nemo-relay/observability/struct-opentelemetryruntimediagnostics): Snapshot of bounded runtime diagnostics recorded by an OpenTelemetry subscriber.
* [OtlpAttributeMapping](/reference/api/rust-library-reference/nemo-relay/observability/struct-otlpattributemapping): Copies a projected OTLP attribute to a second attribute name.

## Enums

* [MarkProjection](/reference/api/rust-library-reference/nemo-relay/observability/enum-markprojection): Export representation for point-in-time mark events.
* [OpenTelemetryType](/reference/api/rust-library-reference/nemo-relay/observability/enum-opentelemetrytype): Semantic projection emitted by an OpenTelemetry exporter.

## Functions

* [default\_mark\_exclude\_names](/reference/api/rust-library-reference/nemo-relay/observability/fn-default-mark-exclude-names): Default mark names excluded from tool projection because they are emitted at high volume and are better represented as exporter-native events. Return the default mark names excluded from OpenTelemetry projections.
* [validate\_attribute\_mappings](/reference/api/rust-library-reference/nemo-relay/observability/fn-validate-attribute-mappings): Validates OTLP attribute mappings shared by exporter configuration surfaces.
* [validate\_metadata\_promotion\_prefixes](/reference/api/rust-library-reference/nemo-relay/observability/fn-validate-metadata-promotion-prefixes): Validates literal Event metadata prefixes promoted to OTLP attributes.