Re: RA with MV attributes

David wrote:
> Example
>
> r1(Names,Cars)
> bill, car1,car2,car4
> john,fred car3
>
> r2(Cars,Colours)
> car1,car3,car4 red
> car2 green
>
> r1 |X| r2 (Names,Cars,Colours)
> bill car1,car4 red
> bill car2 green
> john,fred car3 red
> john,fred green
>
> [...]
> For example the
> last tuple of r1 |X| r2 above doesn’t imply that John and Fred
> don’t own any cars.

So what exactly does that last tuple mean?

-- 
Jon