LLM spans from Langchain not visible in Datadog LLM Observability

[alyiri]

Hi folks 👋

I’m using opentelemetry-instrumentation-langchain to capture spans from LangChain applications and exporting them to Datadog via the OTel exporter. I can see the spans in Datadog APM, but they don’t show up in the LLM Observability dashboard.

From what I understand, Datadog expects certain attributes but the spans produced by opentelemetry-instrumentation-langchain currently use different fields

Questions:

1. Is there an official mapping between the OpenTelemetry gen_ai.* attributes and Datadog’s llm.* attributes?
2. Should opentelemetry-instrumentation-langchain be emitting llm.request.* attributes directly, or is this translation expected to happen in a custom span processor?

[nirga]

Hey @alyiri! what version are you using?