--- a/html-data-guide/index.html	Mon Dec 12 17:00:09 2011 +0000
+++ b/html-data-guide/index.html	Mon Dec 12 17:05:42 2011 +0000
@@ -846,6 +846,9 @@
           <p>
             It is good practice to test the data that you expose within your page against a parser that will show you the data your page contains. It is also good practice to test the data that you expose using a tool that understands the <a>vocabulary</a> you are using. Consumers may provide testing tools and validators for this purpose, or you may need to check the way that vocabulary-specific tools behave with your data.
           </p>
+          <p>
+            If you are constructing your page from a database, another good testing approach is to compare the data extracted from the page with the data extracted directly from the database.
+          </p>
         </section>
         <section>
           <h4>Clear Licensing</h4>