Full text search
Base character sets

Base character sets are identified by (usually formal) public identifiers. These public identifiers are interpreted to produce a character set and to identify:

• the LC Letter, UC Letter, Digit and Special characters,
• the "control" characters (for use if SHUNCHAR CONTROLS is used), and
• characters associated with graphic representations (for example which character is the uppercase letter "A").

The text associated with a character set's public identifier must conform to the description of an "external character set description". An external character set description describes a character set in a manner similar to a described character set portion in an SGML Declaration (ISO 8879 production [175]).