Business-to-Business (B2B) requires companies to communicate, despite using different information systems. Transactions between businesses require the sender and receiver to understand the message the same way. An XML-based purchase order in one company must be acceptable for another company. The main advantage of electronic communication is cost and time reduction. The greatest problem is that the companies use different information systems, which can‘t communicate with each other unless there is a kind of connection is established.
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The BAPI Gateway Component (BC-FES-AIT) Purpose The BAPI Gateway component allows you to call BAPIs (which are methods of SAP business objects) and RFC function modules dynamically. This means that at design time you do not have to know which BAPIs or function modules you are going to call at run time. Integration Using the Repository Services to Obtain Metadata Since you do not know which BAPIs or function modules you are going to call at run time, you also do not know the metadata of those BAPIs or function modules. For example, you do not know which BAPIs exist for a business object you wish to use, and for each of the BAPIs you may call in that business object you do not know what their parameters are, and what is the data type of each of the parameters.
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DCOM provides a standardized basis for creating and integrating distributed software components. External client applications can use DCOM as infrastructure for their communication with SAP servers, to access R/3 components. With this technology, R/3 components such as BAPIs or remote function modules appear as COM objects and use the runtime environment of the Microsoft Transaction Server (MTS). The DCOM Connector provides a C++ Template Library developed by SAP, which you can use to create COM objects from business objects of the R/3 system and administer them. The two scenarios below describe the different uses of the DCOM Connector: PC Client Applications
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