diff --git a/Examples/SchemaBuilder/Schemas/Message.php b/Examples/SchemaBuilder/Schemas/Message.php
index 58883ec..15b3bda 100644
--- a/Examples/SchemaBuilder/Schemas/Message.php
+++ b/Examples/SchemaBuilder/Schemas/Message.php
@@ -31,6 +31,12 @@ class Message
             "https://schemas.auxiliumsoftware.co.uk/v1/collection.json"
         ],
         MaxSize: 0,
+        Child: [
+            "@comment"=>"All direct recipients should be addressed",
+            "@valid_schemas"=>[
+                "https://schemas.auxiliumsoftware.co.uk/v1/user.json"
+            ]
+        ]
     )]
     public string $Recipients;