CJKV Information Processing, 2nd Edition

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Chapter 7: Typography

Adjusting inter-glyph spacingTable 7-40.

Glyph string

Before

  





After

  





Note how the inter-glyph spacing of the characters in the rst line of the text is adjusted

so that it can be properly right-justied.

JIS X 4051:2004 Character Classes

e JIS X 4051:2004 standard establishes character classes for the purpose of properly

specifying inter-glyph spacing. Inter-glyph spacing is all about context, specically when

glyphs from dierent character classes come into contact or are in proximity. ese char-

acter classes are oen referred to as mojikumi ( mojikumi in Japanese) classes.

Mojikumi is the Japanese word that means “text composition,” and obviously refers to

typography.

Interestingly, the three versions of the JIS X 4051 standard specify slightly dierent sets

of character classes. Table 7-41 lists the character classes that are specied by the JIS X

4051:2004 standard, and additionally indicates which ones were present in the 1993 and

1995 versions of the standard through the use of the integer identier that are used in the

standard itself.

JIS X 4051 character classesTable 7-41.

2004 character class 1993 equivalent ...