標準號：SIS SS 63 61 34-1986
中文標準名稱：信息處理．ISO 第7位和8位編碼字符集，代碼擴展型技術
英文標準名稱：Information processing - ISO 7-bit and 8-bit coded character sets - Code exten- sion techniques
發布日期：1986/11/15 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：This International Standard specifies methods of extending the 7-bit code, remaining in a 7-bit environment or increasing to an 8-bit environment. These techniques are described in four inter-related clauses dealing respectively with— the extension of the 7-bit code remaining in a 7-bit en-vironment;— the structure of a family of 8-bit codes;— the extension of an 8-bit code remaining in an 8-bit en-vironment;— the relationship between the 7-bit code and an 8-bit code.This International Standard also describes the structure of families of codes which are related to the code of ISO 646 by their structure.Code extension techniques are classified and some classes are given a structure in this International Standard. Specific assign-ments of bit combinations to rel?te individual character sets and control f unctions with their invocation or designation are to be made in accordance with ISO 2375 (see annex A).