Developer Proposes OpenTelemetry Standard to Track Data Freshness in Pipelines

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A developer has put forward a vendor-neutral semantic convention called data.staleness.* to make data freshness a standardized signal within the OpenTelemetry observability framework. The proposal addresses a common blind spot in modern data pipelines, where upstream data can silently go stale for hours while all other health metrics — latency, error rates, and throughput — appear normal. Currently, teams and vendors each measure freshness in incompatible, proprietary ways, with no shared standard across systems or backends. The convention introduces a small set of metrics rooted in the Age of Information (AoI) concept, distinguishing between data age and processing lag to detect when a source has stopped producing. The proposal is an independent community project under discussion with the OpenTelemetry Semantic Conventions SIG and has not yet been officially adopted.

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