Small quibble: UUIDs are not guaranteed to be unique. It's just extremely 
likely they will be, and they be sufficient for almost all applications, 
including this one.

Saagar Jha



> On Jan 10, 2017, at 2:00 PM, Jean-Daniel <mail...@xenonium.com> wrote:
> 
> UUID means Universally unique identifier and it must be unique: 
> https://en.wikipedia.org/wiki/UUID <https://en.wikipedia.org/wiki/UUID>
> 
> To generate an UUID, use a standard system function (CFUUID, NSUUID, libuuid, 
> …)
> 
> 
>> Le 10 janv. 2017 à 11:36, Daryle Walker <dary...@mac.com> a écrit :
>> 
>> Been reading up on NSIncrementalStore, including its guide. I think I grok 
>> it more now. When initializing an instance, you're supposed to submit an 
>> UUID. Can a single value be used for all instances, or is it supposed to 
>> unique per instance?  If the latter, and the source data doesn't already 
>> have a UUID field, do you to take heroic measures to ensure uniqueness? Or 
>> is a casual effort enough?
>> 
>> Sent from my iPhone
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