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Application Programming Interfaces (APIs) can be used to support different scenarios. The main distinction is whether the leading system is an SAP System or an external system.
SAP System as the Leading System
This can be the case if you want to display the result of a configuration in graphical form. APIs are used to transfer the configuration data to the external system. See the following graphic.
Master data is maintained in an external system. This data is transferred to the SAP classification system or Configurator using APIs at regular intervals. See the following graphic.
External System as the Leading System
If the external system is the leading system, you can use APIs to access SAP master data and SAP functions, such as the classification system or Configurator. The external system runs as a standalone application or interface, as shown in the graphic below. See the following graphic.
Examples:
