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# EJB CMP

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For CMP applications deployed to an application server for which TopLink provides CMP integration (see "Application Server Support"), when you configure a descriptor for an entity bean with container-managed persistence with an `ObjectChangeTrackingPolicy`, TopLink code generates a concrete subclass to implement the TopLink `ChangeTracker` interface at deploy time (see "Configuring Object Change Tracking Policy").

Note: The preceding paragraph is also true for applications that use EJB 3.0 persistence.