> On Dec 6, 2016, at 10:18 PM, Chris Hanson <c...@me.com> wrote:
> 
> On Dec 5, 2016, at 4:18 PM, Daryle Walker <dary...@mac.com 
> <mailto:dary...@mac.com>> wrote:
> 
>> I've heard that Core Data is a object graph and persistence library. What if 
>> you want just the first part?  The graph seems like a neat way to save on 
>> modeling code, the external format is not database-ish at all (so the 
>> capability for custom export formats won't help). Can I just not use the 
>> persistence part and use custom save & load functions? Or do I have to (or 
>> should) give up on Core Data?
> 
> This is exactly the sort of thing that subclassing NSAtomicStore 
> <https://developer.apple.com/reference/coredata/nsatomicstore> lets you do.
> 
> There are only a few methods to override, and then you can just use one of 
> your own documents as if it were one of the built-in persistent store types.

I have looked into that, that’s why I wrote in:

>> the external format is not database-ish at all (so the capability for custom 
>> export formats won't help)

The store format assumes there’s at least one field in a record that can be 
used like a database(-ish) index.  Custom stores can’t help if the data is too 
dumb to have such a qualifying field.

— 
Daryle Walker
Mac, Internet, and Video Game Junkie
darylew AT mac DOT com 

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