Your memory is correct, and there's a whole other dimension to many of these algorithms that Unicode calls "tailoring". In the specific case of collation, the tailoring can be done by adjusting the weights table to match a specific locale. Aside from providing a different "allkeys.bin" file, Ziglyph doesn't have much in the way of tailoring yet, but it's definitely an interesting avenue to investigate further.
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Where does locale come into play? I fuzzily remember an article about how two different countries sort the same language differently.
Your memory is correct, and there's a whole other dimension to many of these algorithms that Unicode calls "tailoring". In the specific case of collation, the tailoring can be done by adjusting the weights table to match a specific locale. Aside from providing a different "allkeys.bin" file, Ziglyph doesn't have much in the way of tailoring yet, but it's definitely an interesting avenue to investigate further.