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Re: Displaying bytes (was: Inadequate documentation of silly characters

From: Kenichi Handa
Subject: Re: Displaying bytes (was: Inadequate documentation of silly characters on screen.)
Date: Wed, 25 Nov 2009 17:16:29 +0900

In article <address@hidden>, "Stephen J. Turnbull" <address@hidden> writes:

> I'm not sure.  As it seems that windows-1252 is a superset of
> iso-8859-1, it may be ok to give windows-1252 the higher priority.
> How do iso-8859-1 users think?

> Why not make a Windows-12xx coding-category?  If you don't want to
> advertise what it is, you could call it "ascii8" or "pseudo-ascii" or
> something like that.


A coding-category of a coding-system is automatically
determined by :coding-type arg (and by some other arg
depending on :coding-type) of define-coding-system.  And
iso-8859-x and windows-12xx are exactly the same in this
aspect; i.e. both :coding-type is `charset' which means the
coding system is for decoding/encoding charsets in

Perhaps it is good to add one more coding-category
`charset8' to which such coding-systems that handle a single
byte charset containing many 0x80..0x9F area code are

> (Wouldn't some of the obsolete Vietnamese
> standards fit this too?  Ie, 0-0177 are the same as ISO-646, and
> 0200-0377 are used for the alternate script?)

Do you mean such coding-systems as vietnamese-tcvn and
vietnamese-viscii?  Although their 0x00-0x1F are not the
same as ASCII, yes, they can be classified into `charset8'

Kenichi Handa

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