[Dev] [UIDev] Item Collection inclusion/exclusion

[Stuart Parmenter]

How it is implemented isn't the issue here.  This is a question of what 
the correct behavior expected by the design team is.

stuart

Andi Vajda wrote:
> 
>> If an item already exists in an item collection because it meets the 
>> rule, and then you call include() passing that item, should the item 
>> exist in the list twice?
> 
> 
> If ref-collections are used to implement these lists, the answer is no. 
> A ref
> to an item can occur only once in a ref collection.
> 
> Andi..
> 
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