/**
  * Returns a string of all HTML tags
  *
  * Returns a string of all HTML tags
  *
  * @return string Used HTML tags
  */
 function _getAllHTMLTagsAsString()
 {
     $result = "";
     $tags =& ilObjAdvancedEditing::_getAllHTMLTags();
     foreach ($tags as $tag) {
         $result .= "<{$tag}>";
     }
     return $result;
 }