Re: Nulls, integrity, the closed world assumption and events

Neo wrote:
> dbd's tree view of pizza:
> pizza
> id
> 12345
> crust
> chicago
> cheese
> mozzarella
> provolone
> topping
> peppers
> mushrooms
> pepperoni
>
> dbd query:
> (& (get pizza instance *)
> (get * topping (!= (get topping instance *)
> peppers)))

Now write the dbd query for all cheeses matched with Pepperoni in at least one pizza.

Keith -- Fraud 6 Received on Tue Jan 23 2007 - 19:34:23 CST