Add condition with sum and count for prometheus summaries

open-telemetry · Jan 9, 2023 · 3cd0591 · 3cd0591
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -26,8 +26,10 @@ release.
 ### Semantic Conventions
 
 ### Compatibility
+
 - Add condition with sum and count for prometheus summaries
 ([3059]https:/open-telemetry/opentelemetry-specification/pull/3059)
+
 ### OpenTelemetry Protocol
 
 - Add table for OTLP/HTTP response code and client retry recommendation

diff --git a/specification/compatibility/prometheus_and_openmetrics.md b/specification/compatibility/prometheus_and_openmetrics.md
@@ -104,7 +104,7 @@ Multiple Prometheus metrics are merged together into a single OTLP Summary:
 * The `quantile` label on non-suffixed metrics is used to identify quantile points in summary metrics. Each Prometheus line produces one quantile on the resulting summary.
 * Lines with `_count` and `_sum` suffixes are used to determine the summary's count and sum.
 * If `_count` is not present, the metric MUST be dropped.
-* If `_sum` is not present, the summaries's sum MUST be unset.
+* If `_sum` is not present, the summaries's sum MUST be [set to zero.](https:/open-telemetry/opentelemetry-proto/blob/d8729d40f629dba12694b44c4c32c1eab109b00a/opentelemetry/proto/metrics/v1/metrics.proto#L601)
 
 ### Dropped Types