By looking at the goals above, it can be concluded that e-commerce is a system built with the aim to improve the efficiency and effectiveness in business by leveraging information technology to improve the quality of the product / service and information as well as reduce the costs that are not needed so that the price of the product / service and the information can be suppressed in such a way without reducing the quality of existing. Types of E-Commerce In general the activities of e-commerce covers a variety of activities ranging from direct marketing, search jobs, online banking, banking, e-government, e-purchasing, B2B exchanges, ccommerce, m-commerce, auctions, travel, online publishing and consumer services. In its application of e-commerce can be divided into two major parts of business to business (B2B) and business to customer (B2C). In the development of B2B faster than B2C. Business to business e-commerce in general, using mechanisms EDI (electronic data interchange). But because so many existing standards, the implementation is difficult between the businesspeople to interact so developed nowadays called Extensible Markup Language (XML) developed by the World Wide Web Consortium (W3C). XML is stored in the structure and type of data elements in the form of documents such as HTML tags so that it is effectively used in different systems. So that the previous EDI network which is often called VAN (value added network) with the popularity of the Internet began to be known a system called EDI over the Internet and other emerging systems such as electronic / internet procurement and ERP (enterprise resource planning).