The Supplement covers a number of topics deemed to be beneficial to trade data compilers, including an overview of compiling practices, the revised International convention on the simplification and harmonization of customs procedures (revised Kyoto Convention), the 2007 edition of the Harmonized Commodity Description and Coding System, specific compilation issues such as goods for processing and re-exports, an overview of the differences between IMTS and general merchandise in balance of payments statistics, the lessons learned from the Intrastat system of the European Union, and the topic of linking trade and business statistics.