zulfishah/AFIncrementalStore — pull request #1 by davidfilip (2013-02-26 09:04:25+00:00)
Title: New candidate key: _id

There are few databases (MongoDB) that use _id as a default identifier field. If you then access simple REST server that just pass the result from the db to your iOS client the app will crash while using default settings taken from examples.

Otherwise I think _id is nice addition into the candidateKeys anyway.