CJKV Information Processing, 2nd Edition

Charset Designations

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275

Ideographs encoded according to UnicodeTable 4-77.

Ideograph Unicode UTF-8 UTF-16BE UTF-32BE

󰙂

622 6  2 6 22   6 22



649 6 1 89 6 49   6 49

󰙂

47  9 87  47    47



557 5  97 5 57   5 57

Charset Designations

In this section you will learn about the dierence between a character set and an encod-

ing. You will also learn why this distinction is critically important in several important

contexts, one of which is information interchange, whether in the form of email or other

electronic media. You see, in order to explicitly indicate the content of a document, such

as an email message or an HTML le, there is the notion of “charset” (character set),

which is used as an identier.

Character Sets Versus Encodings

e fundamental ways in which character sets are dierent from encodings—which are

especially clear when in the context of CJKV—are as follows:

Character sets, especially CJKV ones, can usually be encoded in more than one way. •

Consider ISO-2022 and EUC encodings, both of which are commonly used to en-

code most CJKV character sets.

*

Most CJKV encodings support more than one character set. Consider EUC-JP for •

Japan, which supports JIS X 0201-1997, JIS X 0208:1997, and JIS X 0212-1990 in a

mixed one-, two-, and three-byte encoding.

Table 4-78 lists several CJKV encodings, along with the characters sets tha ...