from zenpage news class

42 function remove() {
43 if ($success = parent::remove()) {
44 $success = query("DELETE FROM " . prefix('obj_to_tag') . "WHERE type='news' AND objectid=" . $this->getID());
45 $success = $success && query("DELETE FROM ".prefix('news2cat')." WHERE news_id = ".$this->getID()); // delete the category association
46 }
47 return $success;
48 }

but where is delete from news?
$success = $success && query("DELETE FROM ".prefix('news')." WHERE id = ".$this->getID()); // remove the article

ok i found (classes)
sorry

The wonders of the object model! The decendent classes have only to implement their class specific actions and allow the parent class to do the more general stuff.