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how do i re-hydrate a core data URIRepresentation without knowing the PSC?

Subject: how do i re-hydrate a core data URIRepresentation without knowing the PSC?
From: Ken Victor <email@hidden>
Date: Thu, 29 Jun 2006 17:05:09 -0700
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given that i can "archive" an NSManagedOBject instance via:

[coder encodeObject: [[instance objectID] URIRepresentation] forKey: @"objectIdKey"];

how do i go about getting back the NSManagedObject? more specifically, managedObjectIDForURIRepresentation needs to be sent to a PersistantStoreCoordinator instance and given that i'm in a multi-doc environment, how do to find which PSC corresponds to a URI? (same problem exists if i try to use objectWithID... ie, in a multi-doc environment, how do i know which MOC to message?).

thanx,
ken

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