diff --git a/reference/yaf/ini.xml b/reference/yaf/ini.xml
index accc16e18d..bdf39093cd 100644
--- a/reference/yaf/ini.xml
+++ b/reference/yaf/ini.xml
@@ -243,13 +243,27 @@
      </term>
      <listitem>
       <para>
-       Only works as of PHP 5.3, if this value is On, All class of Yaf will
+       Only works as of PHP 5.3, if this value is On, All classes of Yaf will
        named in namespace style.
       </para>
       <para>
-       For example, Yaf_Route_Rewrite => \Yaf\Route\Rewrite,
-       Yaf_Controller_Abstract => \Yaf\Controller_Abstract (Abstract is the
-       keyword, can not used as a class name)
+       For example:
+       <screen>
+        <![CDATA[
+Yaf_Route_Rewrite => \Yaf\Route\Rewrite
+Yaf_Request_Http  => \Yaf\Request\Http
+        ]]>
+       </screen>
+       There is a exception, that is some classes like
+       <classname>Yaf_Controller_Abstract</classname>.
+       The last component is a keyword of PHP, could not be used as a class
+       name, so for such classes:
+       <screen>
+        <![CDATA[
+Yaf_Controller_Abstract => \Yaf\Controller_Abstract
+Yaf_Route_Static => \Yaf\Route_Static
+        ]]>
+       </screen>
       </para>
      </listitem>
     </varlistentry>