This policy merges conflicts between the persistent store’s version of the object and the current in-memory version, giving priority to in-memory changes.
The merge occurs by individual property. For properties that have been changed in both the external source and in memory, the in-memory changes trump the external ones.
Available in Mac OS X v10.4 and later.
Declaration Syntax Version Information- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)