Actions($user_id,$session_id);

• view($itemid,$itemdesc,$itemurl);
• buy($itemid,$itemdesc,$itemurl);
• rate($itemid,$itemdesc,$itemurl,$rvalue);

Recommendations($user_id);

• alsoViewed($itemid,$n=10);
• alsoBought($itemid,$n=10);
• ratedGood($itemid,$n=10);
• recForUser($user_id=$this->userid,$n=10);
• relatedItems($itemid,$n=10);

Rankings();

• mostViewed($timeRange="ALL",$n=10);
• mostBought($timeRange="ALL",$n=10);
• mostRated($timeRange="ALL",$n=10);
• bestRated($timeRange="ALL",$n=10);
• worstRated($timeRange="ALL",$n=10);