Maybe this is strange coming from me, but I have been giving it a 
thought, the last few days.

What is the motivation to go to the one value per key thing again. 
Opposed to unique(objectid - key - value)?

The unique constraint basically kills everything that remotely tries to 
duplicate entries, and allows the features that were requested. Without 
semantics in the value field.


I would love to hear some comments about this thought, because I think 
'unique' in overhead is really not that much.


Stefan

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