Open Inference Instrumentation for Retriever Traces and Attributes

Yes, OpenInference instrumentation libraries (such as for LangChain and LlamaIndex) automatically create spans with kind OpenInferenceSpanKindValues.RETRIEVER and store retrieved documents in the SpanAttributes.RETRIEVAL_DOCUMENTS attribute. This is confirmed by test cases and code in openinference-instrumentation-llama-index and openinference-instrumentation-langchain, where retriever spans are checked for these attributes.For custom retrievers, you can also manually set the span kind to RETRIEVER and add the RETRIEVAL_DOCUMENTS attribute using the OpenInference semantic conventions, as shown in instrumentation examples and manual instrumentation docs.Would you like more detail or a code example?Sources: - openinference-instrumentation-llama-index/test_handler.py - Slack: Instrumentation Example - openinference-instrumentation-langchain

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