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New node Charsets.

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Richard M. Stallman 2002-02-20 22:36:29 +00:00
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man/mule.texi
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@ -98,6 +98,7 @@ C-x 8}.
* Single-Byte Character Support::
You can pick one European character set
to use without multibyte characters.
* Charsets:: How Emacs groups its internal character codes.
@end menu
@node International Chars
@ -132,28 +133,6 @@ language, to make it convenient to type them.
The prefix key @kbd{C-x @key{RET}} is used for commands that pertain
to multibyte characters, coding systems, and input methods.
@ignore
@c This is commented out because it doesn't fit here, or anywhere.
@c This manual does not discuss "character sets" as they
@c are used in Mule, and it makes no sense to mention these commands
@c except as part of a larger discussion of the topic.
@c But it is not clear that topic is worth mentioning here,
@c since that is more of an implementation concept
@c than a user-level concept. And when we switch to Unicode,
@c character sets in the current sense may not even exist.
@findex list-charset-chars
@cindex characters in a certain charset
The command @kbd{M-x list-charset-chars} prompts for a name of a
character set, and displays all the characters in that character set.
@findex describe-character-set
@cindex character set, description
The command @kbd{M-x describe-character-set} prompts for a character
set name and displays information about that character set, including
its internal representation within Emacs.
@end ignore
@node Enabling Multibyte
@section Enabling Multibyte Characters
@ -1360,3 +1339,35 @@ method, but does not depend on having the input methods installed. This
mode is buffer-local. It can be customized for various languages with
@kbd{M-x iso-accents-customize}.
@end itemize
@node Charsets
@section Charsets
@cindex charsets
Emacs groups all supported characters into disjoint @dfn{charsets}.
Each character code belongs to one and only one charset. For
historical reasons, Emacs typically divides an 8-bit character code
for an extended version of ASCII into two charsets: ASCII, which
covers the codes 0 through 127, plus another charset which covers the
``right-hand part'' (the codes 128 and up). For instance, the
characters of Latin-1 include the Emacs charset @code{ascii} plus the
Emacs charset @code{latin-iso8859-1}.
Emacs characters belonging to different charsets may look the same,
but they are still different characters. For example, the letter
@samp{o} with acute accent in charset @code{latin-iso8859-1}, used for
Latin-1, is different from the letter @samp{o} with acute accent in
charset @code{latin-iso8859-2}, used for Latin-2.
@findex list-charset-chars
@cindex characters in a certain charset
@findex describe-character-set
There are two commands for obtaining information about Emacs
charsets. The command @kbd{M-x list-charset-chars} prompts for a name
of a character set, and displays all the characters in that character
set. The command @kbd{M-x describe-character-set} prompts for a
charset name and displays information about that charset, including
its internal representation within Emacs.
To find out which charset a character in the buffer belongs to,
put point before it and type @kbd{C-u C-x =}.