A Promotion is the child of an Event. A Promotion Item is the child of Promotion, Event, Vendor, and Campaign. A Promotion Selling Item is the child of Promotion Item, Promotion Price Derivation, and Campaign Media Selling Item; and is in a many to many relationship with Campaign Message Depiction. A Campaign is the parent of Promotion Item, Campaign Media, andPromotion Media Cost; and the child of Event and Business Week. Promotion Media Cost is the child of Promotion Selling Item, Event, Business Week, Campaign, and Campaign Media. Communication Type is the parent of Campaign Execution Message and Media Type which in turn is the parent of Media. Campaign Message Depiction has PCreatives and Campaign Execution Message as parents.