ITIGG is an international group of experts engaged in the development and implementation of UN/EDIFACT-standard messages for electronic trading in the transport industry.ITIGG is a subgroup of D4, the UN/EDIFACT Message Development Group for Transport. ITIGG develops recommendations which provide software developers with a series of simple, straightforward tools to assist in designing applications which can be used for trading electronically throughout the world, and to clarify the intentions of the designers of key UN/EDIFACT messages.