collect ignores resource information from metric producers

CHANGELOG.md

@@ -17,6 +17,8 @@ release.
   ([#3546](https://github.com/open-telemetry/opentelemetry-specification/pull/3546))
 - Revise the exemplar default reservoirs.
   ([#3627](https://github.com/open-telemetry/opentelemetry-specification/pull/3627))
+- MetricReader.Collect ignores Resource from MetricProducer.Produce.
+  ([#3636](https://github.com/open-telemetry/opentelemetry-specification/pull/3636))
 
 ### Logs
 

specification/metrics/sdk.md

@@ -1135,6 +1135,12 @@ SDK](../overview.md#sdk) authors MAY choose to add parameters (e.g. callback,
 filter, timeout). [OpenTelemetry SDK](../overview.md#sdk) authors MAY choose the
 return value type, or do not return anything.
 
+`Collect` SHOULD invoke [Produce](#produce-batch) on registered
+[MetricProducers](#metricproducer). If the bastch of metric points from
+`Produce` includes [Resource](../resource/sdk.md) information, `Collect` SHOULD
+ignore `Resource` from `Produce`, and use the `Resource` provided when
+constructing the MeterProvider instead.
+
 Note: it is expected that the `MetricReader.Collect` implementations will be
 provided by the SDK, so it is RECOMMENDED to prevent the user from accidentally
 overriding it, if possible (e.g. `final` in C++ and Java, `sealed` in C#).
@@ -1406,10 +1412,6 @@ in-memory state MAY implement the `MetricProducer` interface for convenience.
 `AggregationTemporality` of produced metrics. SDK authors MAY provide utility
 libraries to facilitate conversion between delta and cumulative temporalities.
 
-If the batch of [Metric points](./data-model.md#metric-points) returned by
-`Produce()` includes a [Resource](../resource/sdk.md), the `MetricProducer` MUST
-accept configuration for the [Resource](../resource/sdk.md).
-
 ```text
 +-----------------+            +--------------+
 |                 | Metrics... |              |