note 45747 added to ref.dom

Hi, Can anyone explain why I'm getting this error below: "Cannot instantiate non-existent class: domdocument" I am trying to use this class to parse xml using PHP. But for some reason the class is not existent. Could it be that I have to include a module? Thanks. ---- Manual Page -- http://www.php.net/manual/en/ref.dom.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+45747 Delete -- http://master.php.net/manage/user-notes.php?action=delete+45747&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+45747&report=yes Search -- http://master.php.net/manage/user-notes.php