[drools-user] Help on writing XML rules

Hi,

I'm new to drools. I came across this piece of rule in one of the blogs. The
rule is like this:

when
                $cust  : Customer( region >= 1 )
                $order : Order( customer == $cust, totalAmount > 30 )
then
               something...

Following are my questions

1. In the above rule, I specify Order( customer == $cust...) to make the
rule more specific to a customer. Right? 

2. Suppose I remove the 'customer == $cust' check from Order, won't the
result be the same?

3. Cal I write the same thing using XML in drools 3.0. Is that possible?  

4. Also, in my second condition can I specify some more CEs like

             $order: Order( (customer == $cust , (totalAmount > 500 ||
numberoforders < 400) )

Thanks,
Sudha
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