An agreement between two companies who wish to do business together: for example, to jointly develop and market some product. If the companies need to exchange some data over a network then they enter into a trading partner agreement. This describes what data will be passed between the companies and the format of this data. Companies have found producing such an agreement a slow process—certainly too slow for the current commercial climate where speed is of the essence in bringing products to market. Because of this, a number of EDI standards have been proposed. Almost certainly the most advanced of these is Open EDI.