Log record mutations are visible in next registered processors (#4067)

### Current description Closes #4065
open-telemetry · Sep 4, 2024 · 42dd11a · 42dd11a
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -21,6 +21,9 @@ release.
 
 ### Logs
 
+- Clarify that log record mutations are visible in next registered processors.
+  ([#4067](https://github.com/open-telemetry/opentelemetry-specification/pull/4067))
+
 ### Events
 
 ### Baggage

diff --git a/specification/logs/sdk.md b/specification/logs/sdk.md
@@ -324,6 +324,9 @@ therefore it SHOULD NOT block or throw exceptions.
 
 **Returns:** `Void`
 
+For a `LogRecordProcessor` registered directly on SDK `LoggerProvider`,
+the `logRecord` mutations MUST be visible in next registered processors.
+
 A `LogRecordProcessor` may freely modify `logRecord` for the duration of
 the `OnEmit` call. If `logRecord` is needed after `OnEmit` returns (i.e. for
 asynchronous processing) only reads are permitted.