CJKV Information Processing, 2nd Edition

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Appendix D: Glossary

character that is not considered standard on

most operating systems or environments. See

also system-specic character.

USLP

Unix System Laboratories Pacic.

USV

See Unicode Scalar Value.

UTC

Unicode Technical Committee.

UTF

Unicode (or UCS) Transformation Format. A

series of encoding forms for Unicode and ISO

10646. See also UTF-8, UTF-16, and UTF-32.

UTF-2

Obsolete. A UTF dened by AT&T Bell Labs

(Plan 9) and X/Open for encoding Unicode

text as a stream of bytes. Also called FSS-UTF

(File System Safe UTF), and now referred to as

UTF-8. See also Plan 9 and UTF-8.

UTF-7

A variation of Base64 encoding that trans-

forms Unicode encodings—UCS-2, UCS-4,

and UTF-16—into a form that can be safely

transmitted through 7-bit pathways. Most

ASCII characters represent themselves under

this encoding.

UTF-8

e 8-bit encoding form (and encoding

scheme) of Unicode and ISO 10646 that uses

up to four code units to represent a character.

Its original denition, which accommodated

UCS-4 encoding, used a variable-length one-

through six-byte encoding. Once called UTF-

2 and FFS-UTF (File System Safe UTF).

UTF-16

e 16-bit encoding form of Unicode and

ISO 10646. Uses 16-bit code units. Non-BMP

characters are encoded through the use of

High and Low Surrogates. Requires the BOM

to specify byte order. See also BOM.

UTF-16BE

A Unicode encoding scheme that represents

the big-endian ...