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RE: Fwd: War of Attrition (was: Underwhelmed (WAS:


attrition bill
At 10:32 AM 9/26/2002 +0100, Bill de hÓra wrote:

>It looked highly procedural to me, given those conditional blocks and
>assignments. Is there a Prolog or XSLT flavoured variant? That would be
>declarative.

I think what you mean is that when you see a FLWR expression you think of 
it as a loop. It is probably better to think of it as a lot like 
SELECT-FROM-WHERE. The syntax for a FLWR expression *does* look procedural 
(which makes it easier to explain to users), and naive implementations may 
take a procedural approach, but more sophisticated applications are taking 
an algebraic approach to optimization, along the lines of what is 
traditionally used in query languages.

Jonathan


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