diff --git a/NEWS b/NEWS
index bfe6a285..0219e8be 100644
--- a/NEWS
+++ b/NEWS
@@ -38,6 +38,8 @@ NEWS ( CHANGELOG and HISTORY )                                     HTMLPurifier
 ! Implement TinyMCE styled whitelist specification format in
   %HTML.Allowed
 ! Config object gives more friendly error messages when things go wrong
+! Advanced API implemented: easy functions for creating elements (addElement)
+  and attributes (addAttribute) on HTMLDefinition
 - Deprecated and removed EnableRedundantUTF8Cleaning. It didn't even work!
 - DOMLex will not emit errors when a custom error handler that does not
   honor error_reporting is used
diff --git a/library/HTMLPurifier/HTMLDefinition.php b/library/HTMLPurifier/HTMLDefinition.php
index d0a1f1c7..b621fb6f 100644
--- a/library/HTMLPurifier/HTMLDefinition.php
+++ b/library/HTMLPurifier/HTMLDefinition.php
@@ -208,6 +208,10 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
     
     /**
      * Adds a custom attribute to a pre-existing element
+     * @param $element_name String element name to add attribute to
+     * @param $attr_name String name of attribute
+     * @param $def Attribute definition, can be string or object, see
+     *             HTMLPurifier_AttrTypes for details
      */
     function addAttribute($element_name, $attr_name, $def) {
         $module =& $this->getAnonymousModule();
@@ -215,8 +219,23 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
         $element->attr[$attr_name] = $def;
     }
     
-    var $_anonModule;
+    /**
+     * Adds a custom element to your HTML definition
+     * @note See HTMLPurifier_HTMLModule::addElement for detailed 
+     *       parameter descriptions.
+     */
+    function addElement($element_name, $type, $contents, $attr_collections, $attributes) {
+        $module =& $this->getAnonymousModule();
+        // assume that if the user is calling this, the element
+        // is safe. This may not be a good idea
+        $module->addElement($element_name, true, $type, $contents, $attr_collections, $attributes);
+    }
     
+    /**
+     * Retrieves a reference to the anonymous module, so you can
+     * bust out advanced features without having to make your own
+     * module.
+     */
     function &getAnonymousModule() {
         if (!$this->_anonModule) {
             $this->_anonModule = new HTMLPurifier_HTMLModule();
@@ -225,6 +244,8 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
         return $this->_anonModule;
     }
     
+    var $_anonModule;
+    
     
     // PUBLIC BUT INTERNAL VARIABLES --------------------------------------
     
diff --git a/tests/HTMLPurifier/HTMLDefinitionTest.php b/tests/HTMLPurifier/HTMLDefinitionTest.php
index d95a6da9..13804472 100644
--- a/tests/HTMLPurifier/HTMLDefinitionTest.php
+++ b/tests/HTMLPurifier/HTMLDefinitionTest.php
@@ -57,10 +57,8 @@ class HTMLPurifier_HTMLDefinitionTest extends UnitTestCase
         $config = HTMLPurifier_Config::create(array(
             'HTML.DefinitionID' => 'HTMLPurifier_HTMLDefinitionTest->test_addAttribute'
         ));
-        $config->revision = 9;
         $def =& $config->getHTMLDefinition(true);
         $def->addAttribute('span', 'custom', 'Enum#attribute');
-        $def = $config->getHTMLDefinition();
         
         $purifier = new HTMLPurifier($config);
         $input = '<span custom="attribute">Custom!</span>';
@@ -69,6 +67,21 @@ class HTMLPurifier_HTMLDefinitionTest extends UnitTestCase
         
     }
     
+    function test_addElement() {
+        
+        $config = HTMLPurifier_Config::create(array(
+            'HTML.DefinitionID' => 'HTMLPurifier_HTMLDefinitionTest->test_addElement'
+        ));
+        $def =& $config->getHTMLDefinition(true);
+        $def->addElement('marquee', 'Inline', 'Inline', 'Common', array('width' => 'Length'));
+        
+        $purifier = new HTMLPurifier($config);
+        $input = '<span><marquee width="50">Foobar</marquee></span>';
+        $output = $purifier->purify($input);
+        $this->assertIdentical($input, $output);
+        
+    }
+    
 }
 
 ?>
\ No newline at end of file