FrameMaker supports the GBK character set, which is a superset of the GB2312-80 character set. The Simplified Chinese versions of Windows systems support GBK. UNIX and Macintosh support the standard GB2312-80 character set. The characters in the GBK character set are encoded in the 0x8140 and 0xFEFE code range on Windows. The characters on Macintosh and UNIX are encoded within 0xA1A1 and 0xFEFE. Because the characters between 0xA1A1 and 0xFEFE are identical on all platforms, documents are cross-platform compatible. However, if you use extended characters in GBK, they will be displayed as meaningless characters on Macintosh and UNIX.
FrameMaker supports the Big5 character set. These characters are encoded within 0xA140 and 0xFEFE on Windows and Macintosh. Chinese UNIX supports a larger character set (CNS11643-1992) in seven code planes. The first two code planes include the same characters as in the Big5 character set, although the code mapping is different. FrameMaker supports only the first two code planes on UNIX. If you enter characters in code plane 3 and above, they will appear as spaces in FrameMaker. The Traditional Chinese version of the UNIX operating system uses EUC- CNS encoding. FrameMaker provides code conversion between Big5 and EUC-CNS.
FrameMaker supports the KSC 5601-1992 character set. These characters are encoded in the 0xA1A1 and 0xFEFE code range on Windows, Macintosh, and UNIX. This encoding method is known as Wansung encoding. Most Windows versions have additional Hangul characters (Windows codepage 1361), which are called Johab characters. Because Johab characters are not commonly used and are not standard, FrameMaker products do not support these characters. If you enter a Johab character, it may become two separate, meaningless single-byte characters.