is it possible to do a count() based on attribute values?

Hello,

I know you can do count(name[(_at_)ratio]) and that will
give you the number of name elements which have a
ratio attribute, but is it possible to do something
like count(name[(_at_)ratio]=0(_dot_)5) or even include a range
like count(name[(_at_)ratio]>0.5 and name[(_at_)ratio]<0.6)?

Cheers,

Donal


        
        
                
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