AW: ASCII and Unicode lifespan

From: Dominikus Scherkl (
Date: Thu May 19 2005 - 02:33:30 CDT

  • Next message: Antoine Leca: "Re: ASCII and Unicode lifespan"

    > For example: by using a
    > modified UTF-8 format where a ASCII letter can be used as a
    > switch selector between any local encodings - that method
    > will allow to save A LOT of space for commonly used characters.
    That already exists - use SCSU.
    The only disadvantage of it is the ambiguity (a sequence of characters
    can be encoded in different ways - so roundtripping
    most likely will destroy sigatures and the like).

    You should look carefuly at the standard.
    The only problems with the "can't take it back" policy I
    can see are:
    - the characters used for a particular language become
    discontinous. But: this is inevitable at least for characters
    used by different languages that requires different orders
    or uses more or less characters from that set. The problem
    is solved by the collation algorithms. Any order of characters
    will need such an algorithm for at least some languages, so
    a new standard will make nothing easier.
    - false or unnessessary characters can't be excluded. But:
    noone requires you to use them, and they can be deprecated,
    so they won't be used at all. Remains only a space-problem,
    but for now the remaining place to encode new characters is
    plenty. May be if it realy becomes too full, the Unicode
    Consortium will change it's policy and declare the (then
    many decades unused) deprecated characters as unassigned.
    - Characters are encoded that you find obsolete or unnessesary.
    But thats your problem, simply don't use them.

    So, I don't see any evidence for a new standard.

    Dominikus Scherkl

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