diff --git a/doc/main.html b/doc/main.html
index 4f55eaf..05974ee 100644
--- a/doc/main.html
+++ b/doc/main.html
@@ -908,6 +908,10 @@ <h4>External code snippets</h4>
         </div>
 
         <p>Keeping code snippets separate from the main element allows the snippets to be individually formatted and validated.</p>
+      
+        <p>External code snippets are not additional elements of the document
+        and are not listed in the <i>Additional element</i> annex, which is
+        covered at <a href="#sec-elements-section"></a>.</p>
       </section>
 
       <section id="sec-code-element">