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Describe collation order rules (from POSIX WG)

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Andrey A. Chernov 1996-08-11 14:55:14 +00:00
parent d2b945efae
commit 1b91f0ec7f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=17513
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% Base collation scheme: 1994-03-22
% Ordering algorithm:
% 1. Spaces and hyphen (but not soft
% hyphen) before punctuation
% characters, punctuation characters
% before numbers,
% numbers before letters.
% 2. Letters with diacritical marks are
% members of equivalence classes
% 3. A distinction is made with regards
% to case as noted below.
% 4. Special characters are ignored
% when comparing letters, but then
% they are considered
% 5. The alphabets are sorted in order
% of first appearance in ISO 10646:
% Latin, Greek, Cyrillic, etc.
%
% According to Greek specifications,
% the steps 2. and 3. above are reversed
% for the Greek script
% collating symbols
collating-symbol <CAPITAL>
collating-symbol <CAPITAL-SMALL>
collating-symbol <SMALL-CAPITAL>
collating-symbol <SMALL>
% <CAPITAL-SMALL> and <SMALL-CAPITAL>
% are for cases like Danish <A><a>
% and Spanish <C><h> being treated
% as one letter.