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Stuff with the Perl Foundation. A couple of patches in the Perl core. A few CPAN modules. That about sums it up.
Hop on over to Perlmonks and you can read one of the reasons SQL sucks (it's bag-oriented instead of set-oriented).
Yes, tuples can be ordered while a set is not, even though tuples in the relational model are unordered. I believe the distinction here was to ensure that you don't get "Bob, Paris" (assuming "customer, city") and "Paris, Bob" (assuming "city, customer") in the same query and thus getting a result which is effectively duplicated and having negative impacts on subsequent operations. In this sense, what make a "tuple" a "tuple" is not the ordering of the attributes but the names of them. This is actually f
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