An entity (hereafter "aggregator") acts as a repository to which sellers submit descriptive information about a product or service available for sale, and business rules (collectively called "product package") to be used in selling the product or service to buyers. Sellers submit their product packages...http://www.google.co.uk/patents/US20020184116?utm_source=gb-gplus-sharePatent US20020184116 - Data structure for holding product information
