MetricProducers are provided as config to MetricReaders instead of th…

…rough a RegisterProducer operation
open-telemetry · Jul 20, 2023 · 25a6902 · 25a6902
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -13,6 +13,9 @@ release.
 
 ### Metrics
 
+- MetricProducers are provided as config to MetricReaders instead of through a RegisterProducer operation.
+ ([#3613](https:/open-telemetry/opentelemetry-specification/pull/3613))
+
 ### Logs
 
 ### Resource

diff --git a/specification/metrics/sdk.md b/specification/metrics/sdk.md
@@ -57,7 +57,6 @@ linkTitle: SDK
  * [Exemplar defaults](#exemplar-defaults)
 - [MetricReader](#metricreader)
  * [MetricReader operations](#metricreader-operations)
- + [RegisterProducer(metricProducer)](#registerproducermetricproducer)
  + [Collect](#collect)
  + [Shutdown](#shutdown-1)
  * [Periodic exporting MetricReader](#periodic-exporting-metricreader)
@@ -1042,6 +1041,7 @@ SHOULD provide at least the following:
 * The default output `aggregation` (optional), a function of instrument kind. If not configured, the [default aggregation](#default-aggregation) SHOULD be used.
 * The default output `temporality` (optional), a function of instrument kind. If not configured, the Cumulative temporality SHOULD be used.
 * The default aggregation cardinality limit to use, a function of instrument kind. If not configured, a default value of 2000 SHOULD be used.
+* **Status**: [Experimental](../document-status.md). Zero of more [MetricProducer](#metricproducer)s (optional) to collect metrics from in addition to metrics from the SDK.
 
 The [MetricReader.Collect](#collect) method allows general-purpose
 `MetricExporter` instances to explicitly initiate collection, commonly
@@ -1097,21 +1097,6 @@ functions.
 
 ### MetricReader operations
 
-#### RegisterProducer(metricProducer)
-
-**Status**: [Experimental](../document-status.md)
-
-RegisterProducer causes the MetricReader to use the provided
-[MetricProducer](#metricproducer) as a source of aggregated metric data in
-subsequent invocations of Collect. RegisterProducer is expected to be called
-during initialization, but MAY be invoked later. Multiple registrations
-of the same MetricProducer MAY result in duplicate metric data being collected.
-
-If the [MeterProvider](#meterprovider) is an instance of
-[MetricProducer](#metricproducer), this MAY be used to register the
-MeterProvider, but MUST NOT allow multiple [MeterProviders](#meterprovider)
-to be registered with the same MetricReader.
-
 #### Collect
 
 Collects the metrics from the SDK and any registered