Remove aggregation temporality enum and field. (#710)

Author: aalexand

CHANGELOG.md

@@ -4,6 +4,10 @@
 
 The full list of changes can be found in the compare view for the respective release at <https://github.com/open-telemetry/opentelemetry-proto/releases>.
 
+### Removed
+
+- profiles: remove aggregation temporality enum and field. [#710](https://github.com/open-telemetry/opentelemetry-proto/pull/710)
+
 ## 1.8.0 - 2025-09-02
 
 ### Changed

opentelemetry/proto/profiles/v1development/profiles.proto

@@ -308,80 +308,10 @@ message Link {
   bytes span_id = 2;
 }
 
-// Specifies the method of aggregating metric values, either DELTA (change since last report)
-// or CUMULATIVE (total since a fixed start time).
-enum AggregationTemporality {
-  /* UNSPECIFIED is the default AggregationTemporality, it MUST not be used. */
-  AGGREGATION_TEMPORALITY_UNSPECIFIED = 0;
-
-  /** DELTA is an AggregationTemporality for a profiler which reports
-  changes since last report time. Successive metrics contain aggregation of
-  values from continuous and non-overlapping intervals.
-
-  The values for a DELTA metric are based only on the time interval
-  associated with one measurement cycle. There is no dependency on
-  previous measurements like is the case for CUMULATIVE metrics.
-
-  For example, consider a system measuring the number of requests that
-  it receives and reports the sum of these requests every second as a
-  DELTA metric:
-
-  1. The system starts receiving at time=t_0.
-  2. A request is received, the system measures 1 request.
-  3. A request is received, the system measures 1 request.
-  4. A request is received, the system measures 1 request.
-  5. The 1 second collection cycle ends. A metric is exported for the
-      number of requests received over the interval of time t_0 to
-      t_0+1 with a value of 3.
-  6. A request is received, the system measures 1 request.
-  7. A request is received, the system measures 1 request.
-  8. The 1 second collection cycle ends. A metric is exported for the
-      number of requests received over the interval of time t_0+1 to
-      t_0+2 with a value of 2. */
-  AGGREGATION_TEMPORALITY_DELTA = 1;
-
-  /** CUMULATIVE is an AggregationTemporality for a profiler which
-  reports changes since a fixed start time. This means that current values
-  of a CUMULATIVE metric depend on all previous measurements since the
-  start time. Because of this, the sender is required to retain this state
-  in some form. If this state is lost or invalidated, the CUMULATIVE metric
-  values MUST be reset and a new fixed start time following the last
-  reported measurement time sent MUST be used.
-
-  For example, consider a system measuring the number of requests that
-  it receives and reports the sum of these requests every second as a
-  CUMULATIVE metric:
-
-  1. The system starts receiving at time=t_0.
-  2. A request is received, the system measures 1 request.
-  3. A request is received, the system measures 1 request.
-  4. A request is received, the system measures 1 request.
-  5. The 1 second collection cycle ends. A metric is exported for the
-      number of requests received over the interval of time t_0 to
-      t_0+1 with a value of 3.
-  6. A request is received, the system measures 1 request.
-  7. A request is received, the system measures 1 request.
-  8. The 1 second collection cycle ends. A metric is exported for the
-      number of requests received over the interval of time t_0 to
-      t_0+2 with a value of 5.
-  9. The system experiences a fault and loses state.
-  10. The system recovers and resumes receiving at time=t_1.
-  11. A request is received, the system measures 1 request.
-  12. The 1 second collection cycle ends. A metric is exported for the
-      number of requests received over the interval of time t_1 to
-      t_1+1 with a value of 1.
-
-  Note: Even though, when reporting changes since last report time, using
-  CUMULATIVE is valid, it is not recommended. */
-  AGGREGATION_TEMPORALITY_CUMULATIVE = 2;
-}
-
-// ValueType describes the type and units of a value, with an optional aggregation temporality.
+// ValueType describes the type and units of a value.
 message ValueType {
   int32 type_strindex = 1; // Index into ProfilesDictionary.string_table.
   int32 unit_strindex = 2; // Index into ProfilesDictionary.string_table.
-
-  AggregationTemporality aggregation_temporality = 3;
 }
 
 // Each Sample records values encountered in some program context. The program