EDI is described as the interchange of structured data according to agreed message standards between computer systems, by electronic means. Structured data equates to a simple and direct method of presenting the data content of a document. The method of ensuring the correct interpretation of the information by the computer system is defined by the EDI standard."
EDI is a technique used to communicate business transactions between computer systems of different companies and organizations. Note that sometimes the EDI mechanism deployed at a company is often used to interface to other systems within the same organization."
ALE interface is mostly used for communication within different R/3 SAP systems. like you have a distributed environment and you need to share data between two SAP systems then you will use ALE/IDOC technique.
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