In addition , it has become necessary to integrate paper trade documents into the electronic information interchange systems that are now available to trade such as UN/EDIFACT ( the United Nations Electronic Data Interchange for Administration , Commerce and Transport ) , XML ( Extensible Markup Language ) and the Internet . The UNECE has therefore launched the United Nations electronic trade Documents ( UNeDocs ) project . The purpose of the project is to develop and implement solutions for efficient trade document systems based on international trade standards and technologies that are accessible to traders from SMEs and developing countries .