Add support for empty values in Logs Data Model

CHANGELOG.md

@@ -20,6 +20,9 @@ release.
 
 ### Logs
 
+- Add support for empty values.
+  ([#3853](https://github.com/open-telemetry/opentelemetry-specification/pull/3853))
+
 ### Resource
 
 ### OpenTelemetry Protocol

specification/logs/data-model.md

@@ -112,7 +112,9 @@ Value of type `any` can be one of the following:
 
 - An array (a list) of `any` values,
 
-- A `map<string, any>`.
+- A `map<string, any>`,
+
+- [since 1.31.0] An empty value (e.g. `null`).
 
 #### Type `map<string, any>`