Hi Holger,

> In TBC I did not implement option 1 due to performance reasons. If we  
> would have to distinguish same objects, then we would need to walk  
> through a complete result set, while if we just accumulate statistics  
> then it's enough to just ask the triple store for the number of  
> matches - an operation that is significantly faster than walking  
> through them all.
>

Yes, I understand.

Is it a potential shortcut that you filter based on a namespace.

SELECT  count(?subject)
WHERE {
    ?subject a :Something .
    FILTER (afn:namespace(?subject)  =  'http://something/')
}

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