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Many Asian languages are written using symbols rather than letters. Because of the large number of symbols used, these languages require two bytes to represent each symbol (rather than one byte as used in languages such as English). These language representations are known as double byte character sets, or DBCS.
DBCS data is normally delineated by special characters known as shift characters. A string of data can contain a mixture of single byte (SBCS) and double byte data. A shift out character is used to mark the start of DBCS data and a shift in character marks the return to SBCS data.
Manipulating a DBCS string requires special care to preserve its integrity. The NCL language provides extensive support for DBCS data manipulation. This support is available in product regions executing with the SYSPARMS DBCS operand set to YES, IBM, or FUJITSU.
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