diff --git a/specification/common/README.md b/specification/common/README.md
index 0c1eb50c0be..3b39cacd039 100644
--- a/specification/common/README.md
+++ b/specification/common/README.md
@@ -27,12 +27,16 @@ aliases: [/docs/reference/specification/common/common]
 An `Attribute` is a key-value pair, which MUST have the following properties:
 
 - The attribute key MUST be a non-`null` and non-empty string.
-- The attribute value is either:
+- The attribute value can be of `any` type, where any is defined as one of the following:
   - A primitive type: string, boolean, double precision floating point (IEEE 754-1985) or signed 64 bit integer.
-  - A homogeneous array of values of primitive type.
-  - An array of any attribute values [since 1.15.0].
-  - A key/value map, where key is string and value is any attribute value [since 1.15.0].
-
+  - A homogeneous array of values of primitive type [before 1.19.0].
+  - An array of `any` values [since 1.19.0].
+  - A key/value map, where key is string and value is `any` value [since 1.19.0].
+
+Complex attribute types (such as homogenous arrays, arrays of any, and maps) SHOULD be
+used sparingly, in situations where their use minimizes manipulation of the data’s
+original structure.
+  
 When exporting to protocols that do not natively support a particular non-string
 value type the following conversion SHOULD be performed: