1. A system comprising: a product aggregator that is operable to receive product objects, the product objects including a product object that represents an abstraction of a product used in trading and that includes product attributes characterizing the product; and a trade item modifier that is operable to receive the product object and the product attributes, and is further operable to derive a trade item object therefrom for use in the trading of the product by defining trade item attributes that are determined based on the product attributes and on trading requirements of an application of a trading partner.