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Δός μοι ποῦ στῶ, καὶ κινῶ τὴν γῆν — Ἀρχιμήδης [http://www.macchiato.com] ----- Original Message ----- From: "David Hopwood" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, October 28, 2001 18:40 Subject: casefold o NFC = NFC o casefold? > -----BEGIN PGP SIGNED MESSAGE----- > > AFAICS, all of the case folding mappings in Unicode 3.1 map to a > string that is normalised according to NFC or NFD in the same way > as the input character, don't map to a different combining class, > and operate uniformly on canonical equivalents. Also any combining > characters following a character that is mapped will stay in the > same order. Therefore, I conjecture that: > > casefold(NFC(x)) = NFC(casefold(x)) > casefold(NFD(x)) = NFD(casefold(x)) > > for all of the case folding types and all strings x. However, > CaseFolding-4.txt says, "NOTE: case folding does not preserve > normalization formats!" > > It clearly doesn't preserve NFKC or KFKD (U+20A8 RUPEE SIGN demonstrates > how this can fail), but if it does preserve NFC and NFD, shouldn't that > be clarified? Or have I missed something, and there is some reason why > it doesn't preserve NFC/NFD? > > - -- > David Hopwood <[EMAIL PROTECTED]> > > 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 > > > -----BEGIN PGP SIGNATURE----- > Version: 2.6.3i > Charset: noconv > > iQEVAwUBO9zBHDkCAxeYt5gVAQHbPQgApl2UZe0JlQHYzJB5C8V6RK2UvF3LXIHx > /MAxM6KjmkZozWrb9nkMA0NxT3BpehPMrJOUM49xRoLvwcFzLK5vwOwVyOVpZZXw > rqa2CmymDAJfvCoCEH4nOGXqLwezZdVFQuHgJsxAaUTIQWLd5bcwB8dCB5VEd4Yz > J8Qrx53q3p5+TO+jWk2dgUeOhr3G5W2Kf6zka8NeFGlL5HhTpwT2agQM5vii14/s > JnC8Ka+HNbkDdPLNio6iOR44h46MLrr8jyO4oGWk/SX16KT5ATUxdNNjCD7jjrPF > mGhIQywClkIjgtQy4JYWhyxrQknvMih2f/ausbRn4ldf9FBtk33DNQ== > =6tSm > -----END PGP SIGNATURE----- > >
