On Tue, Jul 15, 2008 at 8:41 AM, Hamish Allan <[EMAIL PROTECTED]> wrote:
> If you were using Core Data, expressing your familial relations as
> to-many relationships with inverses, it would be straightforward to
> achieve the query you want (and indeed, to create a GUI for that
> query).

In fact, as long as you have modeled relationships from parent to
child you can do it, Core Data or not.  Get a reference to Balbo and
Ponto and then use a keypath involving @distinctUnionOfArrays to get
to it.  A bit of set theory is helpful here.

--Kyle Sluder
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