| A |
This normally indicates the
JIS X 0208 standard. |
JIS covers several
standards relating to character sets.
JIS X 0202-1991
Method for extending encodings for data
exchange
This defines a method for using several
character codes, including both 1 and 2
byte characters, on the same system by
switching between them.
JIS X 0208:1997
Two-byte encoded Kanji character set for
data exchange using 7 and 8 bits
This specifies a character set based
around often-used Kanji. It contains 6879
characters.
JIS X 0212-1990
Encoded Kanji for data exchange:
Supplementary Kanji
This is a standard that includes
seldom-used Kanji for use in addition to
those contained in JIS X 0208. These are
called supplementary Kanji. It contains
6067 characters.
JIS X 0221-1995
Universal Character Set (UCS) First
section: Outline and basic multilingual
set
This is an international character set
containing roughly the same characters
from around the world as Unicode does.
With regard to Japanese characters, it
holds the equivalent of JIS X 0208 and
JIS X 0212.
Of these, the phrase
"JIS code" is usually used to refer to
JIS X 0208.
However, JIS X 0208 has been undergone several
proprietary extensions by different companies.
These extended character sets cannot truly be
said to be JIS X 0208. When using the terms JIS X
0208 or JIS code, it is better to think of them
as not including user-defined characters or
makers' proprietary characters (machine-dependent
characters).
Furthermore, JIS X 0208 itself varies depending
on the year of creation. In particular, in the
shift from JIS X 0208-1978, created in 1978, to
JIS X 0208-1983, created in 1983, the positions
of several characters were exchanged. This means
that when sending data from a device compliant
with JIS X 0208-1978 to devices compliant with
later standards, the characters used may change.
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