Tryton is a high-level general purpose application platform. It is the base of a complete business solution as well as a comprehensive health and hospital information system (GNUHealth).

This module allows one to define customs duty based on the tariff code of the "Harmonized Commodity Description and Coding System", also known as the "Harmonized System" (HS) (s.a. http://en.wikipedia.org/wiki/Harmonized_System)