Plural architecture master data management with supplemental attributes

According to one embodiment of the present invention, a system for managing data within a plurality of data management architectures includes at least one processor. The system persists an entity managed by a first data management architecture to a second data management architecture. The first data management architecture manages entity data within data sources and the second data management architecture manages persisted entities within a common repository. Entity attributes are mapped between the first and second data management architectures. The system further provides one or more supplemental attributes for the persisted (e.g., registration mode or fully persisted mode) entity within the second data management architecture, wherein the supplemental attributes are unmapped between the first and second data management architectures. Embodiments of the present invention further include a method and computer program product for managing data within a plurality of data management architectures in substantially the same manner described above.