to-Some Relationship (Core Data/IB questions)

FROM : Ian Jackson
DATE : Wed Apr 02 10:45:41 2008

Following on from a previous question (Core Data/IB questions), I am 
seeking advice again on how I should accomplish the following:

I need to select an arbitrary number (i.e. not necessarily 1 or all) 
of objects from a set of all objects belonging to another entity. I 
assumed this was a job for a to-many relationship, but I can't see how 
to use a to-many relationship, without having all the objects in the 
related entity included.

So will I need to write my own code to select objects via a to-one 
relationship, and add them to an array one by one? I guess the array 
would have to become a kind of property of the entity which is 
choosing from the relationship.

The point of this is to have a store of objects in the second entity, 
which can be picked from by objects of the second entity as needed.

I'd appreciate any advice, thank you.

Ian.