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A storage keyword defines the abstract state of an executor (i.e., a component implementation)
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Component can also manage their storage types.
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A storage object associates an identity (Persistent ID or PID) with a state information. A PID value uniquely identifies a storage object in the persistent store.
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A storage object is created and managed by a persistent store through the agency of a storage home.
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A persistent store is a primary point of contact between the application and the storage mechanism.
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A persistent store manages storage homes through which component implementations can create, incarnate, and destroy storage objects.
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