Nulls SHOULD NOT be allowed in arrays. (open-telemetry#1214)

* Nulls SHOULD NOT be allowed in arrays. * Fill in CHANGELOG link Co-authored-by: Armin Ruech <[email protected]>
CodeBlanch · Nov 16, 2023 · ba55805 · ba55805
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commit ba55805
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diff --git a/specification/common/common.md b/specification/common/common.md
@@ -31,6 +31,9 @@ processors / exporters.
 Attribute values of `null` are not valid and attempting to set a `null` value is
 undefined behavior.
 
+`null` values SHOULD NOT be allowed in arrays. However, if it is impossible to
+make sure that no `null` values are accepted
+(e.g. in languages that do not have appropriate compile-time type checking),
 `null` values within arrays MUST be preserved as-is (i.e., passed on to span
 processors / exporters as `null`). If exporters do not support exporting `null`
 values, they MAY replace those values by 0, `false`, or empty strings.