Remove the "MUST" wording which requires exemplar to be on-by-default (…

…#2414)
open-telemetry · Mar 15, 2022 · b1ca0b3 · b1ca0b3
1 parent 660826e
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -111,6 +111,8 @@ release.
   ([#2282](https://github.com/open-telemetry/opentelemetry-specification/pull/2282))
 - Clarified wildcard and predicate support in metrics SDK View API.
   ([#2325](https://github.com/open-telemetry/opentelemetry-specification/pull/2325))
+- Changed the Exemplar wording, exemplar should be turned off by default.
+  ([#2414](https://github.com/open-telemetry/opentelemetry-specification/pull/2414))
 
 ### Logs
 

diff --git a/specification/metrics/sdk.md b/specification/metrics/sdk.md
@@ -519,11 +519,8 @@ While the metric data point for the counter would carry the attributes `X` and
 A Metric SDK MUST provide a mechanism to sample `Exemplar`s from measurements
 via the `ExemplarFilter` and `ExemplarReservoir` hooks.
 
-A Metric SDK MUST allow `Exemplar` sampling to be disabled. In this instance
-the SDK SHOULD not have overhead related to exemplar sampling.
-
-A Metric SDK MUST sample `Exemplar`s only from measurements within the context
-of a sampled trace BY DEFAULT.
+`Exemplar` sampling SHOULD be turned off by default. If `Exemplar` sampling is
+off, the SDK MUST NOT have overhead related to exemplar sampling.
 
 A Metric SDK MUST allow exemplar sampling to leverage the configuration of
 metric aggregation. For example, Exemplar sampling of histograms should be able