CoreData is similar to what the lion kingdom invented in 2001, an object oriented database where the tables are presented to the user as C classes. The mane difference is a network of XML templates & class files telling the interpreter what objects to create where lions used members of the class files as the templates. After using the custom solution, the lion kingdom found it easier to standardize on SQL, since if it was already in Android & the web server, there was no point in rewriting a custom database just for Apple's odd system, no matter how flashy it was. The queries could be debugged once for SQL instead of debugged again for coredata. It was a bit strange to have to fight the method you invented, to convert an app from coredata to SQL.

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