Define conversion of prometheus native histograms to OpenTelemetry exponential histograms #4561
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…ponential histograms
Co-authored-by: George Krajcsovits <krajorama@users.noreply.github.com>
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Co-authored-by: George Krajcsovits <krajorama@users.noreply.github.com>
Signed-off-by: Arthur Silva Sens <arthursens2005@gmail.com>
Schemas outside of range are dropped
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August 2025 release. ### Logs - Improve concurrency safety description of `LogRecordProcessor.OnEmit`. ([#4578](#4578)) - Clarify that `SeverityNumber` values are used when comparing severities. ([#4552](#4552)) ### Entities - Mention entity references in the stability guarantees. ([#4593](#4593)) ### OpenTelemetry Protocol - Clarify protocol defaults on specification. ([#4585](#4585)) ### Compatibility - Flexibilie escaping of characters that are discouraged by Prometheus Conventions in Prometheus exporters. ([#4533](#4533)) - Flexibilize addition of unit/type related suffixes in Prometheus exporters. ([#4533](#4533)) - Define the configuration option "Translation Strategies" for Prometheus exporters. ([#4533](#4533)) - Define conversion of Prometheus native histograms to OpenTelemetry exponential histograms. ([#4561](#4561)) - Clarify what to do when scope attribute conflicts with name, version and schema URL. ([#4599](#4599)) ### SDK Configuration - Enum values provided via environment variables SHOULD be interpreted in a case-insensitive manner. ([#4576](#4576)) Co-authored-by: Armin Ruech <7052238+arminru@users.noreply.github.com>
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Part of #4494
Changes
This conversion is the inverse of the exp -> native conversion defined here: https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/compatibility/prometheus_and_openmetrics.md#exponential-histograms.
CHANGELOG.mdfile updated for non-trivial changes@open-telemetry/prometheus-interoperability @ywwg @krajorama