After you identify those aggregate objects you plan to replace during a subsequent migration, you use Adoption to establish common ancestry for those objects and all of their components that meet adoption criteria. Adoption creates common ancestry between objects by replacing the Original Encyclopedia ID and Original Object ID of the identified object with the Original Encyclopedia ID and the Original Object ID of the object in the source model that is logically the same. An object whose IDs are replaced by Adoption is usually an object whose definition is replaced by the next migration. (However, once common ancestry is established between objects, migration can take place in either direction.)
System-defined objects always share common ancestry across all models and encyclopedias. Therefore these objects are not selectable for adoption. The exception is the IEF_SUPPLIED Work Attribute Set and its Work Attributes; these are selectable because they can be modified:
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