Add support for filtering attribute keys for streams via an exclude list

CHANGELOG.md

@@ -19,6 +19,9 @@ release.
 
 ### Metrics
 
+- Add support for filtering attribute keys for streams via an exclude list.
+ ([#4188](https:/open-telemetry/opentelemetry-specification/pull/4188))
+
 ### Logs
 
 - Clarify that log record mutations are visible in next registered processors.

spec-compliance-matrix.md

@@ -142,6 +142,7 @@ formats is required. Implementing more than one format is optional.
 | The `View` instrument selection criteria supports the match-all wildcard. | | | + | + | + | | + | | + | + | + | |
 | The name of the `View` can be specified. | | | + | + | + | | + | + | | + | + | |
 | The `View` allows configuring the name, description, attributes keys and aggregation of the resulting metric stream. | | | + | + | + | | + | + | + | + | - | |
+| The `View` allows configuring excluded attribute keys of resulting metric stream. | | + | | | | | | | | | | |
 | The `View` allows configuring the exemplar reservoir of resulting metric stream. | X | | - | | - | | - | | | | - | |
 | The SDK allows more than one `View` to be specified per instrument. | X | | + | + | + | | + | | + | + | + | |
 | The `Drop` aggregation is available. | | + | + | + | + | | + | | + | + | + | |

specification/metrics/sdk.md

@@ -375,6 +375,12 @@ The SDK MUST accept the following stream configuration parameters:
  parameter configured on the instrument instead. If the `Attributes`
  advisory parameter is absent, all attributes MUST be kept.
 
+ Additionally, implementations SHOULD support configuring an exclude-list of
+ attribute keys. The exclude-list contains attribute keys that identify the
+ attributes that MUST be excluded, all other attributes MUST be kept. If an
+ attribute key is both included and excluded, implementations MAY cause the
+ application to fail on initialization.
+
 * `aggregation`: The name of an [aggregation](#aggregation) function to use in
  aggregating the metric stream data.