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Tracking data changes is an essential requirement in many software, application, and business-integration scenarios. Rigorously implementing this requirement is relatively difficult because modeling and working with the delta for typical changes is generally very involved. On the other hand, repetitively implementing it in all the applicable situations is a waste as a single proper model for the delta is suitable for many situations, and in most of cases, the requirements are similar. Service Data Object (SDO), a BEA Systems and IBM-led JSR defining a generic solution for heterogeneous data access, provides developers with an easy-to-implement mechanism for tracking data history at the system level.
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