Re: [xsl] Can sets have order?

[Elliotte Rusty Harold <elharo at metalab dot unc dot edu>]

>>  I'd also agree with my original statement. Terminology isn't always
>>  consistently applied.
>
>Agreed here, but I can't think of a respectable terminology that restricts
>sets to be unordered.
>

I don't know if he's correct or not, but the eminently respectable C. 
J. Date writes on p. 92 of the sixth edition of his well respected 
text "Introduction to Database Systems":

"2. Tuples are unordered (top to bottom)

This property follows from the fact that the body of the relation is 
a mathematical set; sets in mathematics are not ordered."

This is a rather significant point in his discussion.
-- 

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