> > But there's no "official" Unicode standard that
> > I know of (and that isn't saying much) that says that ss and � have to
> > compare as equals.
> 
> http://www.unicode.org/Public/UNIDATA/CaseFolding.txt

And case mappings are defined as a normative property in section 4.2 of the 
standard.

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Jon Hanna                   | Toys and books
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