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In the IETF Internationalised Domain Names working group, there is some
discussion about which normalisation mapping to apply to names entered
by users, before looking them up in the DNS. (I'm arguing for using NFC
and disallowing most or all compatibility characters, as opposed to using
NFKC.)
The following characters have compatibility mappings but not canonical
mappings (and also satisfy some other criteria that aren't really
important to my question):
used in at least
U+0132 LATIN CAPITAL LIGATURE IJ Dutch
U+0133 LATIN SMALL LIGATURE IJ Dutch
U+013F LATIN CAPITAL LETTER L WITH MIDDLE DOT Catalan
U+0140 LATIN SMALL LETTER L WITH MIDDLE DOT Catalan
U+0675 ARABIC LETTER HIGH HAMZA ALEPH Kazakh
U+0676 ARABIC LETTER HIGH HAMZA WAW Kazakh
U+0677 ARABIC LETTER U WITH HAMZA ABOVE Kazakh
U+0678 ARABIC LETTER HIGH HAMZA YEH Kazakh
U+0E33 THAI CHARACTER SARA AM Thai
U+0EB3 LAO VOWEL SIGN AM Lao
U+0EDC LAO HO NO Lao
U+0EDD LAO HO MO Lao
U+FB4F HEBREW LIGATURE ALEPH LAMED Hebrew
The question I'd like to ask is whether they are produced in practice
by common keyboard drivers and operating systems, without using
cut-and-paste or entering the code point.
I.e. can anyone who has an appropriate keyboard try to determine whether
these characters can be entered in a Unicode-enabled entry field or text
editor, using just normal keyboard input? (U+0E33 and U+0EB3 are
combining marks; any appropriate base character will do.)
Thanks in advance.
- --
David Hopwood <david.hopwood@zetnet.co.uk>
Home page & PGP public key: http://www.users.zetnet.co.uk/hopwood/
RSA 2048-bit; fingerprint 71 8E A6 23 0E D3 4C E5 0F 69 8C D4 FA 66 15 01
Nothing in this message is intended to be legally binding. If I revoke a
public key but refuse to specify why, it is because the private key has been
seized under the Regulation of Investigatory Powers Act; see www.fipr.org/rip
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