1. A method for processing a transactional unit comprised of transactional subunits, the method comprising: receiving an identifier of a transactional unit along with parameters for the transactional unit, wherein the transactional unit is comprised of transactional subunits; determining the transactional subunits for the transactional unit using a markup language file for the transactional unit, the markup language file including predefined subunit tags which identify the transactional subunits; and associating at least one parameter for the transactional unit with a transactional subunit.