Bor (Business Object repository)

Business Object repository (BOR): directory of all object types in a hierarchy format. The object types are each assigned to a package (and hence indirectly to an application component as well ).

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The separation line is described in the SAP standard documentation.
Below the separation line is my translation
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Business Object knowledge base (BOR): displays directories of all object types in a hierarchical format. Each object is assigned to a package (and therefore not directly assigned to the application component ).