Michael Kay wrote:
The UCA is written as if there is a single correct
answer, but there isn't.
The UCA doesn't define a particular collation sequence for any
languages, rather it defines the requirements for how collation
mechanisms should allow you to define the collation rules for a given
language and script.
Yes, I should have made that clear. But it doesn't handle things like
collating ISO-646 before ISO-10646, which is what you will often find phone
books and back-of-book indexes doing.
Michael Kay