To support such a well-organized system of information interexchange it is very necessary to conduct high speed data transmission media. Electronic Data Interexchange is an outstanding technology constructed especially for these purposes. No matter how a certain company might have had attitude towards electronic document flow EDI can sufficiently help in business handling of the documents and every financial society can attain advantages out of timely and properly organized information on demands and supply on its let out products which altogether can immensely economize ones efforts, expenses which were previously often occurred while manual processing of the papers. If a company has hundreds or thousands of different suppliers and partners even slightest economy in thirty minutes can economize huge amount of money with high effectiveness. As estimation point in usage of the EDI one can use a unified set of criteria known as Key Performance Identifier (KPI). Those features of employment of unified criteria help the company to compare its own productivity with others all over the world or simply within a single organization to monitor production process at every stage of it. The first multilevel EDI model was somewhat similar to the ISO/OSI 1983 model which described development and maintenance of the network protocols distinctive peculiarity of which was the other level of abstraction. That model consists of four levels, namely Physical infrastructure, Transport, Representation and standards, and Applications and semantics. Physical infrastructure implies network architecture which consists of phone dial-up and cable lines spanned into a network. Internet at the beginning of the EDI development was considered to be as open networks (BITNET) and Intra Corporation specialized networks (EDI-Express General Electric, IBM Information Exchange Network) and backbone networks. Transport of data is carried out by means of e-mail, Telnet, point-to-point and HTTP. Later on a few other protocols were added into the lists, which are SMTP, POP3 (ISP), and IMAP. On the level of representation and standards syntax and semantics describe the structure of databases. Major case in standardization was structure of databases with famous standards ANSI X.12 in the US and UNECE EDIFACT in Asia and Europe. There are also other proprietary branch-wise standards in existence. In the level of application and semantics includes the applications which are created automatically and are processed automatically in concern to reading the databases. Applications are installed at the sender’s side and the recipient’s side in order to make the process of reading resistant to faults, which media can have only converters to transport the data within protocols.
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