Move event.domain from InstrumentationScope to LogRecord (open-telemetry#2940)

Resolves open-telemetry#2939.

Author: jack-berg

CHANGELOG.md

@@ -15,6 +15,10 @@ release.
 
 ### Logs
 
+- Move `event.domain` from InstrumentationScope attributes to LogRecord
+  attributes.
+  ([#2940](https://github.com/open-telemetry/opentelemetry-specification/pull/2940))
+
 ### Resource
 
 ### Semantic Conventions

specification/logs/api.md

@@ -92,7 +92,8 @@ the scope has a version (e.g. a library version). Example value: 1.0.0.
 - `schema_url` (optional): Specifies the Schema URL that should be recorded in
 the emitted telemetry.
 - `event_domain` (optional): Specifies the domain for the Events emitted, which
-should be added as `event.domain` attribute of the instrumentation scope.
+  MUST be added as an attribute with the key `event.domain`
+  to [emitted Events](#emit-event).
 - `include_trace_context` (optional): Specifies whether the Trace Context should
 automatically be passed on to the Events and Logs emitted by the Logger. This
 SHOULD be true by default.
@@ -153,7 +154,8 @@ This function MAY be named `logEvent`.
 * `logRecord` - the [LogRecord](#logrecord) representing the Event.
 
 Events require the `event.domain` attribute. The API MUST not allow creating an
-Event if the Logger instance doesn't have `event.domain` scope attribute.
+Event if `event_domain` was not specified when
+the [Logger was obtained](#get-a-logger).
 
 #### Emit LogRecord
 

specification/logs/semantic_conventions/events.md

@@ -4,11 +4,8 @@
 
 This document describes the attributes of standalone Events that are represented
 in the data model by `LogRecord`s. Events are recorded as LogRecords that are shaped
-in a special way:
-
-- They have a LogRecord attribute `event.name` (and possibly other LogRecord attributes).
-- They have an InstrumentationScope with a non-empty `Name` and with an
-  InstrumentationScope attribute `event.domain` (and possibly other InstrumentationScope attributes).
+in a special way: Event LogRecords have the attributes `event.domain`
+and `event.name` (and possibly other LogRecord attributes).
 
 The `event.domain` attribute is used to logically separate events from different
 systems. For example, to record Events from browser apps, mobile apps and