Interchange (EDI) stands for an electronic document exchange with formatted structures that can be further processed in computer systems. Web EDI is a further development of the classic EDI approach. Web EDI uses the Internet as a transmission medium and thus considerably expands the scope of EDI use by companies. Every company with Internet access can participate in the EDI-based data exchange. This enables a more efficient design of the entire value chain according to the principle of Efficient Consumer Response (ECR).